diff --git a/.gitignore b/.gitignore
index 16abdd7a..4ed21c61 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,3 +22,4 @@ cps/static/[0-9]*
 .idea/
 *.bak
 *.log.*
+tags
diff --git a/cps/static/js/context.js b/cps/static/js/context.js
new file mode 100644
index 00000000..711a91be
--- /dev/null
+++ b/cps/static/js/context.js
@@ -0,0 +1,147 @@
+/*!
+ * context.js Library associated with > v0.9.6.2 of intention.js
+ * http://intentionjs.com/
+ *
+ * Copyright 2011, 2013 Dowjones and other contributors
+ * Released under the MIT license
+ *
+ */
+
+(function () {
+
+  'use strict';
+  var context = function($, Intention){
+
+    // create a brand spankin new intention object
+    var intent=new Intention(),
+      // placeholder for the horizontal axis
+      horizontal_axis,
+      orientation_axis;
+
+    // throttle funtion used for keeping calls to the resize responive 
+    // callback to a minimum
+    function throttle(callback, interval){
+      var lastExec = new Date(),
+        timer = null;
+
+      return function(e){
+        var d = new Date();
+        if (d-lastExec < interval) {
+          if (timer) {
+            window.clearTimeout(timer);
+          }
+          var callbackWrapper = function(event){
+            return function(){
+              callback(event);
+            };
+          };
+          timer = window.setTimeout(callbackWrapper(e), interval);
+          return false;
+        }
+        callback(e);
+        lastExec = d;
+      };
+    }
+
+    // catchall
+    // =======================================================================
+    intent.responsive([{name:'base'}]).respond('base');
+
+    // width context?
+    // =======================================================================
+    horizontal_axis = intent.responsive({
+      ID:'width',
+      contexts: [
+        {name:'standard', min:840}, 
+        {name:'tablet', min:510},
+        {name:'mobile', min:0}],
+      // compare the return value of the callback to each context
+      // return true for a match
+      matcher: function(test, context){
+        if(typeof test === 'string'){
+          
+          return test === context.name;
+        }
+        return test>=context.min;
+      },
+      // callback, return value is passed to matcher()
+      // to compare against current context
+      measure: function(arg){
+
+        if(typeof arg === 'string'){
+          return arg;
+        }
+
+        return $(window).width();
+    }});
+
+    // orientation context?
+    // =======================================================================
+    orientation_axis = intent.responsive({
+      ID:'orientation',
+      contexts: [{name:'portrait', rotation: 0},
+        {name:'landscape', rotation:90}], 
+      matcher: function(measure, ctx){
+        return measure === ctx.rotation;
+      },
+      measure: function(){
+        var test = Math.abs(window.orientation);
+        if(test > 0) {
+          test = 180 - test;
+        }
+        return test;
+      }
+    });
+
+    // ONE TIME CHECK AXES:
+    // touch device?
+    // =======================================================================
+    intent.responsive({
+      ID:'touch',
+      contexts:[{name:'touch'}], 
+      matcher: function() {
+        return "ontouchstart" in window;
+      }}).respond();
+
+    // retina display?
+    // =======================================================================
+    intent.responsive({
+      ID: 'highres',
+      // contexts
+      contexts:[{name:'highres'}],
+      // matching:
+      matcher: function(){
+        return window.devicePixelRatio > 1;
+      }}).respond();
+
+    // bind events to the window
+    $(window).on('resize', throttle(horizontal_axis.respond, 100))
+      .on('orientationchange', horizontal_axis.respond)
+      .on('orientationchange', orientation_axis.respond);
+
+    // register the current width and orientation without waiting for a window
+    // resize
+    horizontal_axis.respond();
+    orientation_axis.respond();
+    
+    $(function(){
+      // at doc ready grab all of the elements in the doc
+      intent.elements(document);
+    });
+    
+    // return the intention object so that it can be extended by other plugins
+    return intent;
+  };
+
+  (function (root, factory) {
+    if (typeof define === 'function' && define.amd) {
+      // AMD. Register as an anonymous module.
+      define('context', ['jquery', 'intention'], factory);
+    } else {
+      // Browser globals
+      root.intent = factory(root.jQuery, root.Intention);
+    }
+  }(this, function ($, Intention) {
+    return context($, Intention);
+  }));
+}).call(this);
\ No newline at end of file
diff --git a/cps/static/js/intention.js b/cps/static/js/intention.js
new file mode 100644
index 00000000..69e674f9
--- /dev/null
+++ b/cps/static/js/intention.js
@@ -0,0 +1,564 @@
+/*!
+ * intention.js Library v0.9.7.2
+ * http://intentionjs.com/
+ *
+ * Copyright 2011, 2013 Dowjones and other contributors
+ * Released under the MIT license
+ *
+ */
+
+(function(root, factory) {
+
+  'use strict';
+
+  if (typeof define === 'function' && define.amd) {
+    define('intention', ['jquery', 'underscore'], factory);
+  } else {
+    root.Intention = factory(root.jQuery, root._);
+  }
+}(this, function($, _) {
+  'use strict';
+
+  var Intention = function(params){
+    var intent = _.extend(this, params,
+                          {_listeners:{}, contexts:[], elms:$(), axes:{}, priority:[]});
+
+    return intent;
+  };
+
+  Intention.prototype = {
+
+    // public methods
+    responsive:function responsive(contexts, options){
+      // for generating random ids for axis when not specified
+      var idChars = 'abcdefghijklmnopqrstuvwxyz0123456789',
+          id='', i;
+
+      // create a random id for the axis
+      for(i=0; i<5; i++){
+        id += idChars[Math.floor(Math.random() * idChars.length)];
+      }
+      var defaults = {
+        // if no matcher function is specified expect to compare a
+        // string to the ctx.name property
+        matcher: function(measure, ctx){
+          return measure === ctx.name;
+        },
+        // function takes one arg and returns it
+        measure: _.identity,
+        ID: id
+      };
+
+      if(_.isObject(options) === false) {
+        options = {};
+      }
+
+      if((_.isArray(contexts)) && (_.isArray(contexts[0].contexts))){
+        _.each(contexts, function(axis){
+          responsive.apply(this, axis);
+        }, this);
+        return;
+      }
+
+      if((_.isArray(contexts) === false) && _.isObject(contexts)){
+        options = contexts;
+      } else {
+        options.contexts = contexts;
+      }
+
+      // fill in the options
+      options = _.extend({}, defaults, options);
+
+      // bind an the respond function to the axis ID and prefix it
+      // with an underscore so that it does not get whomped accidentally
+      this.on('_' + options.ID + ':', _.bind(
+        function(e){
+          this.axes = this._contextualize(
+            options.ID, e.context, this.axes);
+          this._respond(this.axes, this.elms);
+
+        }, this));
+
+      var axis = {
+        ID:options.ID,
+        current:null,
+        contexts:options.contexts,
+        respond:_.bind(this._responder(options.ID, options.contexts,
+                                       options.matcher, options.measure), this)
+      };
+
+      this.axes[options.ID] = axis;
+
+      this.axes.__keys__ = this.priority;
+
+      this.priority.unshift(options.ID);
+
+      return axis;
+    },
+
+    elements: function(scope){
+
+      // find all responsive elms in a specific dom scope
+      if(!scope){
+        scope = document;
+      }
+
+      $('[data-intent],[intent],[data-in],[in]',
+        scope).each(_.bind(function(i, elm){
+          this.add($(elm));
+        }, this));
+
+      return this;
+    },
+
+    add: function(elms, options){
+
+      var spec;
+
+      if(!options) {
+        options = {};
+      }
+
+      // is expecting a jquery object
+      elms.each(_.bind(function(i, elm){
+        var exists = false;
+        this.elms.each(function(i, respElm){
+          if(elm === respElm) {
+            exists=true;
+            return false;
+          }
+          return true;
+        });
+
+        if(exists === false){
+          // create the elements responsive data
+          spec = this._fillSpec(
+            _.extend(options, this._attrsToSpec(elm.attributes, this.axes)));
+          // make any appropriate changes based on the current contexts
+          this._makeChanges($(elm), spec, this.axes);
+
+          this.elms.push({
+            elm: elm,
+            spec: spec
+          });
+        }
+
+      }, this));
+
+      return this;
+    },
+
+    remove: function(elms){
+      // is expecting a jquery object
+      var respElms = this.elms;
+      // elms to remove
+      elms.each(function(i, elm){
+        // elms to check against
+        respElms.each(function(i, candidate){
+          if(elm === candidate.elm){
+            respElms.splice(i, 1);
+            // found the match, break the loop
+            return false;
+          }
+          return true;
+        });
+      });
+      return this;
+    },
+
+    is: function(ctxName){
+      var axes = this.axes;
+      return _.some(axes.__keys__, function(key){
+        return ctxName === axes[key].current;
+      });
+    },
+
+    current: function(axisName){
+      if(this.axes.hasOwnProperty(axisName)){
+        return this.axes[axisName].current;
+      } else {
+        return false;
+      }
+    },
+
+    // code and concept taken from simple implementation of
+    // observer pattern outlined here:
+    // http://www.nczonline.net/blog/2010/03/09/custom-events-in-javascript/
+    on: function(type, listener){
+
+      var events = type.split(' '),
+          i=0;
+
+      for(i;i<events.length;i++){
+        if(this._listeners[events[i]] === undefined) {
+          this._listeners[events[i]]=[];
+        }
+        this._listeners[events[i]].push(listener);
+      }
+
+      return this;
+    },
+
+    off: function(type, listener){
+      if(_.isArray(this._listeners[type])){
+        var listeners = this._listeners[type],
+            i;
+        for(i=0;listeners.length; i++){
+          if(listeners[i] === listener){
+            listeners.splice(i,1);
+            break;
+          }
+        }
+      }
+      return this;
+    },
+
+    // privates
+    _responder: function(axisID, contexts, matcher, measure){
+
+      var currentContext;
+
+      // called to perform a check
+      return function(){
+
+        var measurement = measure.apply(this, arguments);
+
+        _.every(contexts, function(ctx){
+          if( matcher(measurement, ctx)) {
+            // first time, or different than last context
+            if( (currentContext===undefined) ||
+                (ctx.name !== currentContext.name)){
+
+              currentContext = ctx;
+
+              // event emitting!
+              // emit the private axis event
+              this._emitter(
+                {_type: '_' + axisID + ':', context:currentContext.name},
+                currentContext, this)
+
+              // emit the public axis event
+                ._emitter({_type: axisID + ':', context:currentContext.name},
+                          currentContext, this)
+
+              // attempt to trigger the axis to context pair
+                ._emitter(_.extend({},
+                                   {_type: axisID + ':' + currentContext.name},
+                                   currentContext), currentContext, this)
+
+              // then emit the context event (second ensures the context
+              // changes happen after all dom manipulations)
+                ._emitter(_.extend({}, {_type:currentContext.name},
+                                   currentContext), currentContext, this);
+
+              // done, break the loop
+              return false;
+            }
+            // same context, break the loop
+            return false;
+          }
+          return true;
+        }, this);
+
+        // return the intention object for chaining
+        return this;
+      };
+    },
+
+    _emitter: function(event){
+      if(typeof event === 'string') {
+        event={_type:event};
+      }
+      if(!event.target){
+        event.target=this;
+      }
+      if(!event._type){
+        throw new Error(event._type + ' is not a supported event.');
+      }
+      if(_.isArray(this._listeners[event._type])){
+        var listeners = this._listeners[event._type],
+            i;
+        for(i=0; i<listeners.length; i++){
+          listeners[i].apply(this, arguments);
+        }
+      }
+
+      return this;
+    },
+
+    _fillSpec: function(spec){
+
+      var applySpec = function(fn){
+        _.each(spec, function(axisOptions, axis){
+          _.each(axisOptions, function(ctxOptions, ctx){
+            fn(ctxOptions, ctx, axis);
+          });
+        });
+      }, filler={};
+
+      applySpec(function(options){
+        // check to see if the ctx val is an object, could be a string
+        if(_.isObject(options)){
+          _.each(options, function(val, func){
+            filler[func] = '';
+          });
+        }
+      });
+
+      applySpec(function(options, ctx, axis){
+        if(_.isObject(options)){
+          spec[axis][ctx] = _.extend({}, filler, options);
+        }
+      });
+
+      return spec;
+    },
+
+    _assocAxis: function(ctx, axes){
+
+      var match=false;
+
+      _.every(axes.__keys__, function(axis){
+
+        if(match === false){
+          _.every(axes[axis].contexts, function(ctxCandidate){
+            if(ctxCandidate.name === ctx){
+              match = axis;
+              return false;
+            }
+            return true;
+          });
+          return true;
+        }else {
+          return false;
+        }
+      });
+
+      return match;
+    },
+
+    _makeSpec: function(axis, ctx, sAttr, value, spec){
+      var axisObj,
+          ctxObj;
+
+      if(spec[axis] !== undefined){
+        axisObj = spec[axis];
+
+        if(axisObj[ctx] === undefined) {
+          axisObj[ctx] = {};
+        }
+      } else {
+        axisObj = {};
+        axisObj[ctx] = {};
+        spec[axis] = axisObj;
+      }
+      axisObj[ctx][sAttr] = value;
+
+      return spec;
+    },
+
+    _attrsToSpec: function(attrs, axes){
+
+      var spec={},
+          fullPattern = new RegExp(
+            '^(data-)?(in|intent)-(([a-zA-Z0-9][a-zA-Z0-9]*:)?([a-zA-Z0-9]*))-([A-Za-z:-]+)'),
+          axisPattern =  new RegExp(
+            '^(data-)?(in|intent)-([a-zA-Z0-9][_a-zA-Z0-9]*):$');
+
+      _.each(attrs, function(attr){
+
+        var specMatch = attr.name.match(fullPattern),
+            axisName;
+
+        if(specMatch !== null) {
+
+          specMatch = specMatch.slice(-3);
+          axisName = specMatch[0];
+
+          if(specMatch[0] === undefined){
+
+            // if there is no axis find one:
+            specMatch[0] = this._assocAxis(specMatch[1], axes);
+
+            if(specMatch[0] === false) {
+              // there is no context, so get outa here
+              return; // skipt the attr
+            }
+          } else {
+            specMatch[0] = specMatch[0].replace(/:$/, '');}
+
+          specMatch.push(attr.value);
+          specMatch.push(spec);
+
+          spec = this._makeSpec.apply(this, specMatch);
+
+        } else if(axisPattern.test(attr.name)){
+
+          axisName = attr.name.match(axisPattern)[3];
+
+          _.each(axes[axisName].contexts,
+                 function(context){
+                   this._makeSpec(axisName, context.name, 'class', context.name +
+                            ' ' + attr.value, spec);
+                 },
+                 this);}},
+             this);
+
+      return spec;
+    },
+
+    _contextSpec: function(ctxObj, specs){
+      if(specs.hasOwnProperty(ctxObj.axis) &&
+         specs[ctxObj.axis].hasOwnProperty(ctxObj.ctx)){
+        return specs[ctxObj.axis][ctxObj.ctx];
+      }
+      return {};
+    },
+    _resolveSpecs: function(currentContexts, specs){
+
+      var changes={},
+          moveFuncs=['append', 'prepend', 'before', 'after'];
+
+      _.each(currentContexts, function(ctxObj){
+        // if the axis or the context to not exist in the specs object
+        // skip to the next one
+        _.each(this._contextSpec(ctxObj, specs), function(val, func){
+
+          if(func==='class'){
+            if(!changes[func]){
+              changes[func] = [];
+            }
+            changes[func] = _.union(changes[func], val.split(' '));
+
+          } else if(((changes.move === undefined) ||
+                     (changes.move.value === '')) &&
+                    ($.inArray(func, moveFuncs) !== -1)){
+
+            changes.move = {value:val, placement:func};
+
+          } else {
+            if((changes[func] === undefined) || (changes[func] === '')){
+              changes[func]=val;
+            }
+          }
+        }, this);
+      }, this);
+      return changes;
+    },
+
+    _currentContexts: function(axes) {
+      var contexts = [];
+
+      _.each(axes.__keys__, function(ID){
+        if(axes[ID].current !== null) {
+          contexts.push({ctx:axes[ID].current, axis:ID});
+          return;
+        }
+      });
+
+      return contexts;
+    },
+
+    _removeClasses: function(specs, axes) {
+
+      var toRemove = [];
+
+      _.each(axes.__keys__, function(key){
+
+        var axis = axes[key];
+
+        _.each(axis.contexts, function(ctx){
+
+          // ignore the current context, those classes SHOULD be applied
+          if(ctx.name === axis.current) {
+            return;
+          }
+          var contextSpec = this._contextSpec(
+            {axis:axis.ID, ctx:ctx.name}, specs),
+              classes;
+
+          if(contextSpec !== undefined) {
+            if(contextSpec['class'] !== undefined) {
+              classes = contextSpec['class'].split(' ');
+              if(classes !== undefined){
+                toRemove = _.union(toRemove, classes);
+              }
+            }
+          }
+        }, this);
+
+      }, this);
+
+      return toRemove;
+    },
+
+    _contextConfig: function(specs, axes){
+
+      return this._resolveSpecs(this._currentContexts(axes), specs, axes);
+    },
+
+    _makeChanges: function(elm, specs, axes){
+
+      if(_.isEmpty(axes)===false){
+        var ctxConfig = this._contextConfig(specs, axes);
+
+        _.each(ctxConfig, function(change, func){
+          if(func==='move'){
+            if( (specs.__placement__ !== change.placement) ||
+                (specs.__move__ !== change.value)){
+
+              $(change.value)[change.placement](elm);
+
+              // save the last placement of the element so
+              // we're not moving it around for no good reason
+              specs.__placement__ = change.placement;
+              specs.__move__ = change.value;
+            }
+          } else if(func === 'class') {
+
+            var classes = elm.attr('class') || '';
+
+            // the class add/remove formula
+            classes = _.union(change,
+                              _.difference(classes.split(' '),
+                                           this._removeClasses(specs, axes)));
+
+            elm.attr('class', classes.join(' '));
+
+          } else {
+            elm.attr(func, change);
+          }
+        }, this);
+      }
+      return elm;
+    },
+
+    _respond: function(axes, elms){
+      // go through all of the responsive elms
+      elms.each(_.bind(function(i, elm){
+        var $elm = $(elm.elm);
+        this._makeChanges($elm, elm.spec, axes);
+        $elm.trigger('intent', this);
+      }, this));
+    },
+
+    _contextualize: function(axisID, context, axes){
+      axes[axisID].current = context;
+      return axes;
+    },
+
+    // private props
+
+    // axis test, does it begin with an underscore? for testing inside
+    // spec objects
+    _axis_test_pattern: new RegExp("^_[a-zA-Z0-9]"),
+
+    // match a group after the underscore:
+    _axis_match_pattern: new RegExp("^_([a-zA-Z0-9][_a-zA-Z0-9]*)"),
+
+    // simple trim
+    _trim_pattern:new RegExp( "^\s+|\s+$", "g" )
+  };
+
+  return Intention;
+}));
diff --git a/cps/templates/layout.html b/cps/templates/layout.html
index 2c2d84f9..b2d22d0e 100644
--- a/cps/templates/layout.html
+++ b/cps/templates/layout.html
@@ -24,7 +24,7 @@
     <script src="{{ url_for('static', filename='js/libs/jquery.min.js') }}"></script>
     <!-- Include all compiled plugins (below), or include individual files as needed -->
     <script src="{{ url_for('static', filename='js/bootstrap.min.js') }}"></script>
-    <script src="{{ url_for('static', filename='js/underscore.min.js') }}"></script>
+    <script src="{{ url_for('static', filename='js/underscore-min.js') }}"></script>
     <script src="{{ url_for('static', filename='js/intention.js') }}"></script>
     <script src="{{ url_for('static', filename='js/context.js') }}"></script>
     <script src="{{ url_for('static', filename='js/plugins.js') }}"></script>
diff --git a/cps/templates/user_edit.html b/cps/templates/user_edit.html
index d8403fc1..bb6368d9 100644
--- a/cps/templates/user_edit.html
+++ b/cps/templates/user_edit.html
@@ -23,16 +23,14 @@
       <label for="kindle_mail">{{_('Kindle E-Mail')}}</label>
       <input type="email" class="form-control" name="kindle_mail" id="kindle_mail" value="{{ content.kindle_mail if content.kindle_mail != None }}">
     </div>
-    {% if not content.role_anonymous() %}
     <div class="form-group">
     <label for="locale">{{_('Language')}}</label>
         <select name="locale" id="locale" class="form-control">
             {%  for translation in translations %}
-                <option value="{{translation.language}}" {% if translation.language == content.locale %}selected{% endif %}>{{ translation.display_name }}</option>
+                <option value="{{translation}}" {% if translation|string == content.locale %}selected{% endif %}>{{ translation.display_name }}</option>
             {% endfor %}
         </select>
     </div>
-    {% endif %}
     <div class="form-group">
       <label for="default_language">{{_('Show books with language')}}</label>
         <select name="default_language" id="default_language" class="form-control">
diff --git a/cps/translations/zh_Hans_CN/LC_MESSAGES/messages.mo b/cps/translations/zh_Hans_CN/LC_MESSAGES/messages.mo
new file mode 100644
index 00000000..7adcf65b
Binary files /dev/null and b/cps/translations/zh_Hans_CN/LC_MESSAGES/messages.mo differ
diff --git a/cps/translations/zh_Hans_CN/LC_MESSAGES/messages.po b/cps/translations/zh_Hans_CN/LC_MESSAGES/messages.po
new file mode 100644
index 00000000..645469d5
--- /dev/null
+++ b/cps/translations/zh_Hans_CN/LC_MESSAGES/messages.po
@@ -0,0 +1,824 @@
+# Chinese (Simplified, China) translations for PROJECT.
+# Copyright (C) 2017 ORGANIZATION
+# This file is distributed under the same license as the PROJECT project.
+# FIRST AUTHOR <EMAIL@ADDRESS>, 2017.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: PROJECT VERSION\n"
+"Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
+"POT-Creation-Date: 2017-01-03 19:50+0100\n"
+"PO-Revision-Date: 2017-01-06 17:00+0800\n"
+"Last-Translator: dalin <dalin.lin@gmail.com>\n"
+"Language: zh_Hans_CN\n"
+"Language-Team: zh_Hans_CN <LL@li.org>\n"
+"Plural-Forms: nplurals=1; plural=0\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=utf-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Generated-By: Babel 2.3.4\n"
+
+#: cps/book_formats.py:109 cps/book_formats.py:113 cps/web.py:928
+msgid "not installed"
+msgstr "未安装"
+
+#: cps/helper.py:98
+msgid "Calibre-web test email"
+msgstr "Calibre-web 测试邮件"
+
+#: cps/helper.py:99 cps/helper.py:152
+msgid "This email has been sent via calibre web."
+msgstr "此邮件已通过calibre web发送"
+
+#: cps/helper.py:133 cps/helper.py:221
+#, python-format
+msgid "Failed to send mail: %s"
+msgstr "发送邮件失败: %s"
+
+#: cps/helper.py:151 cps/templates/detail.html:124
+msgid "Send to Kindle"
+msgstr "发送到Kindle"
+
+#: cps/helper.py:174 cps/helper.py:189
+msgid "Could not find any formats suitable for sending by email"
+msgstr "无法适合邮件发送的格式"
+
+#: cps/helper.py:183
+msgid "Could not convert epub to mobi"
+msgstr "无法转换epub到mobi"
+
+#: cps/helper.py:241
+msgid "The requested file could not be read. Maybe wrong permissions?"
+msgstr "无法读取所请求的文件。可能是错误权限不对？"
+
+#: cps/web.py:722
+msgid "Latest Books"
+msgstr "最新书籍"
+
+#: cps/web.py:747
+msgid "Hot Books (most downloaded)"
+msgstr "热门书籍(最多下载)"
+
+#: cps/templates/index.xml:29 cps/web.py:755
+msgid "Random Books"
+msgstr "随机书籍"
+
+#: cps/web.py:768
+msgid "Author list"
+msgstr "作者列表"
+
+#: cps/web.py:785
+#, python-format
+msgid "Author: %(nam)s"
+msgstr "作者: %(nam)s"
+
+#: cps/templates/index.xml:50 cps/web.py:798
+msgid "Series list"
+msgstr "丛书列表"
+
+#: cps/web.py:809
+#, python-format
+msgid "Series: %(serie)s"
+msgstr "丛书: %(serie)s"
+
+#: cps/web.py:811 cps/web.py:907 cps/web.py:1102 cps/web.py:1838
+msgid "Error opening eBook. File does not exist or file is not accessible:"
+msgstr "无法打开电子书。 文件不存在或者文件不可访问:"
+
+#: cps/web.py:842
+msgid "Available languages"
+msgstr "可用语言"
+
+#: cps/web.py:857
+#, python-format
+msgid "Language: %(name)s"
+msgstr "语言: %(name)s"
+
+#: cps/templates/index.xml:43 cps/web.py:870
+msgid "Category list"
+msgstr "分类列表"
+
+#: cps/web.py:880
+#, python-format
+msgid "Category: %(name)s"
+msgstr "分类: %(name)s"
+
+#: cps/web.py:936
+msgid "Statistics"
+msgstr "统计"
+
+#: cps/web.py:944
+msgid "Server restarts"
+msgstr "重启服务器"
+
+#: cps/web.py:1078 cps/web.py:1085 cps/web.py:1092 cps/web.py:1099
+msgid "Read a Book"
+msgstr "阅读一本书"
+
+#: cps/web.py:1141 cps/web.py:1474
+msgid "Please fill out all fields!"
+msgstr "请填写所有字段"
+
+#: cps/web.py:1157
+msgid "An unknown error occured. Please try again later."
+msgstr "发生一个未知错误。请稍后再试。"
+
+#: cps/web.py:1162
+msgid "This username or email address is already in use."
+msgstr "此用户名或邮箱已被使用。"
+
+#: cps/web.py:1165
+msgid "register"
+msgstr "注册"
+
+#: cps/web.py:1181
+#, python-format
+msgid "you are now logged in as: '%(nickname)s'"
+msgstr "您现在已以'%(nickname)s'身份登录"
+
+#: cps/web.py:1185
+msgid "Wrong Username or Password"
+msgstr "用户名或密码错误"
+
+#: cps/web.py:1187
+msgid "login"
+msgstr "登录"
+
+#: cps/web.py:1204
+msgid "Please configure the SMTP mail settings first..."
+msgstr "请先配置SMTP邮箱..."
+
+#: cps/web.py:1208
+#, python-format
+msgid "Book successfully send to %(kindlemail)s"
+msgstr "此书已被成功发给 %(kindlemail)s"
+
+#: cps/web.py:1212
+#, python-format
+msgid "There was an error sending this book: %(res)s"
+msgstr "发送 %(res)s 这本书的时候出现错误"
+
+#: cps/web.py:1214
+msgid "Please configure your kindle email address first..."
+msgstr "请先配置您的kindle电子邮箱地址..."
+
+#: cps/web.py:1234
+#, python-format
+msgid "Book has been added to shelf: %(sname)s"
+msgstr "此书已被添加到书架: %(sname)s"
+
+#: cps/web.py:1255
+#, python-format
+msgid "Book has been removed from shelf: %(sname)s"
+msgstr "此书已从书架 %(sname)s 中删除"
+
+#: cps/web.py:1273 cps/web.py:1294
+#, python-format
+msgid "A shelf with the name '%(title)s' already exists."
+msgstr "已存在书架 '%(title)s'。"
+
+#: cps/web.py:1278
+#, python-format
+msgid "Shelf %(title)s created"
+msgstr "书架 %(title)s 已被创建"
+
+#: cps/web.py:1280 cps/web.py:1305
+msgid "There was an error"
+msgstr "发生错误"
+
+#: cps/web.py:1281 cps/web.py:1283
+msgid "create a shelf"
+msgstr "创建书架"
+
+#: cps/web.py:1303
+#, python-format
+msgid "Shelf %(title)s changed"
+msgstr "书架 %(title)s 已被修改"
+
+#: cps/web.py:1306 cps/web.py:1308
+msgid "Edit a shelf"
+msgstr "编辑书架"
+
+#: cps/web.py:1329
+#, python-format
+msgid "successfully deleted shelf %(name)s"
+msgstr "成功删除书架 %(name)s"
+
+#: cps/web.py:1350
+#, python-format
+msgid "Shelf: '%(name)s'"
+msgstr "书架: '%(name)s'"
+
+#: cps/web.py:1378
+#, python-format
+msgid "Change order of Shelf: '%(name)s'"
+msgstr "修改书架 '%(name)s' 顺序"
+
+#: cps/web.py:1433
+msgid "Found an existing account for this email address."
+msgstr "找到已使用此邮箱的账号。"
+
+#: cps/web.py:1435 cps/web.py:1438
+#, python-format
+msgid "%(name)s's profile"
+msgstr "%(name)s 的资料"
+
+#: cps/web.py:1436
+msgid "Profile updated"
+msgstr "资料已更新"
+
+#: cps/web.py:1447 cps/web.py:1455
+msgid "Admin page"
+msgstr "管理页"
+
+#: cps/templates/admin.html:32 cps/web.py:1475
+msgid "Add new user"
+msgstr "添加新用户"
+
+#: cps/web.py:1508
+#, python-format
+msgid "User '%(user)s' created"
+msgstr "用户 '%(user)s' 已被创建"
+
+#: cps/web.py:1512
+msgid "Found an existing account for this email address or nickname."
+msgstr "已找到使用此邮箱或昵称的账号。"
+
+#: cps/web.py:1535 cps/web.py:1546
+msgid "Mail settings updated"
+msgstr "邮箱设置已更新"
+
+#: cps/web.py:1541
+#, python-format
+msgid "Test E-Mail successfully send to %(kindlemail)s"
+msgstr "测试邮件已成功发送到 %(kindlemail)s"
+
+#: cps/web.py:1544
+#, python-format
+msgid "There was an error sending the Test E-Mail: %(res)s"
+msgstr "发送测试邮件时发生错误: %(res)s"
+
+#: cps/web.py:1547
+msgid "Edit mail settings"
+msgstr "编辑邮箱设置"
+
+#: cps/web.py:1570
+#, python-format
+msgid "User '%(nick)s' deleted"
+msgstr "用户 '%(nick)s' 已被删除"
+
+#: cps/web.py:1625
+#, python-format
+msgid "User '%(nick)s' updated"
+msgstr "用户 '%(nick)s' 已被更新"
+
+#: cps/web.py:1628
+msgid "An unknown error occured."
+msgstr "发生未知错误。"
+
+#: cps/web.py:1630
+#, python-format
+msgid "Edit User %(nick)s"
+msgstr "编辑用户 %(nick)s"
+
+#: cps/web.py:1868
+#, python-format
+msgid "Failed to create path %s (Permission denied)."
+msgstr "创建路径 %s 失败(权限拒绝)。"
+
+#: cps/web.py:1873
+#, python-format
+msgid "Failed to store file %s (Permission denied)."
+msgstr "存储文件 %s 失败(权限拒绝)。"
+
+#: cps/web.py:1878
+#, python-format
+msgid "Failed to delete file %s (Permission denied)."
+msgstr "删除文件 %s 失败(权限拒绝)。"
+
+#: cps/templates/admin.html:4
+msgid "User list"
+msgstr "用户列表"
+
+#: cps/templates/admin.html:7
+msgid "Nickname"
+msgstr "昵称"
+
+#: cps/templates/admin.html:8
+msgid "Email"
+msgstr ""
+
+#: cps/templates/admin.html:9
+msgid "Kindle"
+msgstr ""
+
+#: cps/templates/admin.html:10
+msgid "DLS"
+msgstr ""
+
+#: cps/templates/admin.html:11 cps/templates/layout.html:83
+msgid "Admin"
+msgstr "管理"
+
+#: cps/templates/admin.html:12 cps/templates/detail.html:114
+msgid "Download"
+msgstr "下载"
+
+#: cps/templates/admin.html:13 cps/templates/layout.html:76
+msgid "Upload"
+msgstr "上传"
+
+#: cps/templates/admin.html:14
+msgid "Edit"
+msgstr "编辑"
+
+#: cps/templates/admin.html:15
+msgid "Passwd"
+msgstr "修改密码"
+
+#: cps/templates/admin.html:33
+msgid "SMTP mail settings"
+msgstr "SMTP设置"
+
+#: cps/templates/admin.html:36 cps/templates/email_edit.html:7
+msgid "SMTP hostname"
+msgstr "SMTP地址"
+
+#: cps/templates/admin.html:37
+msgid "SMTP port"
+msgstr "SMTP端口"
+
+#: cps/templates/admin.html:38
+msgid "SSL"
+msgstr ""
+
+#: cps/templates/admin.html:39 cps/templates/email_edit.html:19
+msgid "SMTP login"
+msgstr "SMTP用户名"
+
+#: cps/templates/admin.html:40 cps/templates/email_edit.html:23
+msgid "SMTP password"
+msgstr "SMTP密码"
+
+#: cps/templates/admin.html:41
+msgid "From mail"
+msgstr "来自邮箱"
+
+#: cps/templates/admin.html:53
+msgid "Change SMTP settings"
+msgstr "修改SMTP设置"
+
+#: cps/templates/admin.html:55
+msgid "Configuration"
+msgstr "配置"
+
+#: cps/templates/admin.html:58
+msgid "Log File"
+msgstr "日志文件"
+
+#: cps/templates/admin.html:59
+msgid "Log Level"
+msgstr "日志级别"
+
+#: cps/templates/admin.html:60
+msgid "Port"
+msgstr "端口"
+
+#: cps/templates/admin.html:61
+msgid "Books per page"
+msgstr "每页书籍数"
+
+#: cps/templates/admin.html:62
+msgid "Uploading"
+msgstr "上传"
+
+#: cps/templates/admin.html:63
+msgid "Public registration"
+msgstr "开放注册"
+
+#: cps/templates/admin.html:64
+msgid "Anonymous browsing"
+msgstr "匿名浏览"
+
+#: cps/templates/admin.html:75
+msgid "Administration"
+msgstr "管理"
+
+#: cps/templates/admin.html:77
+msgid "Restart Calibre-web"
+msgstr "重启 Calibre-web"
+
+#: cps/templates/detail.html:38
+msgid "Book"
+msgstr ""
+
+#: cps/templates/detail.html:38
+msgid "of"
+msgstr ""
+
+#: cps/templates/detail.html:44
+msgid "language"
+msgstr "语言"
+
+#: cps/templates/detail.html:103
+msgid "Description:"
+msgstr "简介:"
+
+#: cps/templates/detail.html:128
+msgid "Read in browser"
+msgstr "在浏览器中阅读"
+
+#: cps/templates/detail.html:147
+msgid "Add to shelf"
+msgstr "添加到书架"
+
+#: cps/templates/detail.html:187
+msgid "Edit metadata"
+msgstr "编辑元数据"
+
+#: cps/templates/edit_book.html:14 cps/templates/search_form.html:6
+msgid "Book Title"
+msgstr "书名"
+
+#: cps/templates/edit_book.html:18 cps/templates/search_form.html:10
+msgid "Author"
+msgstr "作者"
+
+#: cps/templates/edit_book.html:22
+msgid "Description"
+msgstr "简介"
+
+#: cps/templates/edit_book.html:26 cps/templates/search_form.html:13
+msgid "Tags"
+msgstr "标签"
+
+#: cps/templates/edit_book.html:31 cps/templates/layout.html:133
+#: cps/templates/search_form.html:33
+msgid "Series"
+msgstr "丛书"
+
+#: cps/templates/edit_book.html:35
+msgid "Series id"
+msgstr "丛书ID"
+
+#: cps/templates/edit_book.html:39
+msgid "Rating"
+msgstr "评分"
+
+#: cps/templates/edit_book.html:43
+msgid "Cover URL (jpg)"
+msgstr "封面URL (jpg)"
+
+#: cps/templates/edit_book.html:48 cps/templates/user_edit.html:27
+msgid "Language"
+msgstr "语言"
+
+#: cps/templates/edit_book.html:59
+msgid "Yes"
+msgstr "确认"
+
+#: cps/templates/edit_book.html:60
+msgid "No"
+msgstr ""
+
+#: cps/templates/edit_book.html:102
+msgid "view book after edit"
+msgstr "编辑后查看书籍"
+
+#: cps/templates/edit_book.html:105 cps/templates/login.html:19
+#: cps/templates/search_form.html:75 cps/templates/shelf_edit.html:15
+#: cps/templates/user_edit.html:94
+msgid "Submit"
+msgstr "提交"
+
+#: cps/templates/edit_book.html:106 cps/templates/email_edit.html:32
+#: cps/templates/shelf_edit.html:17 cps/templates/shelf_order.html:12
+#: cps/templates/user_edit.html:96
+msgid "Back"
+msgstr "后退"
+
+#: cps/templates/email_edit.html:11
+msgid "SMTP port (usually 25 for plain SMTP and 587 for SSL)"
+msgstr "SMTP端口(不加密的SMTP通常是25, SSL加密的是587)"
+
+#: cps/templates/email_edit.html:15
+msgid "Server uses SSL (StartTLS)"
+msgstr "服务器使用SSL (StartTLS)"
+
+#: cps/templates/email_edit.html:27
+msgid "From e-mail"
+msgstr "来自邮箱"
+
+#: cps/templates/email_edit.html:30
+msgid "Save settings"
+msgstr "保存设置"
+
+#: cps/templates/email_edit.html:31
+msgid "Save settings and send Test E-Mail"
+msgstr "保存设置并发送测试邮件"
+
+#: cps/templates/feed.xml:14
+msgid "Next"
+msgstr "下一个"
+
+#: cps/templates/index.html:5
+msgid "Discover (Random Books)"
+msgstr "发现(随机书籍)"
+
+#: cps/templates/index.xml:5
+msgid "Start"
+msgstr "开始"
+
+#: cps/templates/index.xml:7 cps/templates/layout.html:61
+msgid "Search"
+msgstr "搜索"
+
+#: cps/templates/index.xml:15 cps/templates/layout.html:124
+msgid "Hot Books"
+msgstr "热门书籍"
+
+#: cps/templates/index.xml:19
+msgid "Popular publications from this catalog based on Rating."
+msgstr ""
+
+#: cps/templates/index.xml:22 cps/templates/layout.html:122
+msgid "New Books"
+msgstr "新书"
+
+#: cps/templates/index.xml:26
+msgid "The latest Books"
+msgstr "最新书籍"
+
+#: cps/templates/index.xml:33
+msgid "Show Random Books"
+msgstr "显示随机书籍"
+
+#: cps/templates/index.xml:36 cps/templates/layout.html:135
+msgid "Authors"
+msgstr "作者"
+
+#: cps/templates/index.xml:40
+msgid "Books ordered by Author"
+msgstr "书籍按作者排序"
+
+#: cps/templates/index.xml:47
+msgid "Books ordered by category"
+msgstr "书籍按分类排序"
+
+#: cps/templates/index.xml:54
+msgid "Books ordered by series"
+msgstr "书籍按丛书排序"
+
+#: cps/templates/layout.html:48
+msgid "Toggle navigation"
+msgstr ""
+
+#: cps/templates/layout.html:63
+msgid "Go!"
+msgstr "走起！"
+
+#: cps/templates/layout.html:66
+msgid "Advanced Search"
+msgstr "高级搜索"
+
+#: cps/templates/layout.html:87
+msgid "Logout"
+msgstr "注销"
+
+#: cps/templates/layout.html:91 cps/templates/login.html:4
+msgid "Login"
+msgstr "登录"
+
+#: cps/templates/layout.html:92 cps/templates/register.html:18
+msgid "Register"
+msgstr "注册"
+
+#: cps/templates/layout.html:121
+msgid "Browse"
+msgstr "浏览"
+
+#: cps/templates/layout.html:127
+msgid "Discover"
+msgstr "发现"
+
+#: cps/templates/layout.html:130
+msgid "Categories"
+msgstr "分类"
+
+#: cps/templates/layout.html:137 cps/templates/search_form.html:54
+msgid "Languages"
+msgstr "语言"
+
+#: cps/templates/layout.html:140
+msgid "Public Shelves"
+msgstr "公开书架"
+
+#: cps/templates/layout.html:144
+msgid "Your Shelves"
+msgstr "您的书架"
+
+#: cps/templates/layout.html:149
+msgid "Create a Shelf"
+msgstr "创建书架"
+
+#: cps/templates/layout.html:152
+msgid "About"
+msgstr "关于"
+
+#: cps/templates/login.html:7 cps/templates/login.html:8
+#: cps/templates/register.html:7 cps/templates/user_edit.html:8
+msgid "Username"
+msgstr "用户名"
+
+#: cps/templates/login.html:11 cps/templates/login.html:12
+#: cps/templates/register.html:11 cps/templates/user_edit.html:18
+msgid "Password"
+msgstr "密码"
+
+#: cps/templates/login.html:16
+msgid "Remember me"
+msgstr "记住我"
+
+#: cps/templates/read.html:136
+msgid "Reflow text when sidebars are open."
+msgstr ""
+
+#: cps/templates/readpdf.html:29
+msgid "PDF.js viewer"
+msgstr ""
+
+#: cps/templates/readtxt.html:6
+msgid "Basic txt Reader"
+msgstr ""
+
+#: cps/templates/register.html:4
+msgid "Register a new account"
+msgstr "注册新用户"
+
+#: cps/templates/register.html:8
+msgid "Choose a username"
+msgstr "选择一个用户名"
+
+#: cps/templates/register.html:12
+msgid "Choose a password"
+msgstr "选择一个密码"
+
+#: cps/templates/register.html:15 cps/templates/user_edit.html:13
+msgid "Email address"
+msgstr "邮箱地址"
+
+#: cps/templates/register.html:16
+msgid "Your email address"
+msgstr "您的邮箱地址"
+
+#: cps/templates/search.html:6
+msgid "No Results for:"
+msgstr "找不到结果:"
+
+#: cps/templates/search.html:7
+msgid "Please try a diffrent Search"
+msgstr "请尝试别的关键字"
+
+#: cps/templates/search.html:9
+msgid "Results for:"
+msgstr "结果:"
+
+#: cps/templates/search_form.html:23
+msgid "Exclude Tags"
+msgstr "排除标签"
+
+#: cps/templates/search_form.html:43
+msgid "Exclude Series"
+msgstr "排除丛书"
+
+#: cps/templates/search_form.html:64
+msgid "Exclude Languages"
+msgstr "排除语言"
+
+#: cps/templates/shelf.html:6
+msgid "Delete this Shelf"
+msgstr "删除此书架"
+
+#: cps/templates/shelf.html:7
+msgid "Edit Shelf name"
+msgstr "编辑书架名"
+
+#: cps/templates/shelf.html:8
+msgid "change order"
+msgstr "修改顺序"
+
+#: cps/templates/shelf_edit.html:7
+msgid "Title"
+msgstr ""
+
+#: cps/templates/shelf_edit.html:12
+msgid "should the shelf be public?"
+msgstr "要公开此书架吗？"
+
+#: cps/templates/shelf_order.html:5
+msgid "Drag 'n drop to rearrange order"
+msgstr ""
+
+#: cps/templates/shelf_order.html:11
+msgid "Change order"
+msgstr "修改顺序"
+
+#: cps/templates/stats.html:3
+msgid "Linked libraries"
+msgstr "链接库"
+
+#: cps/templates/stats.html:8
+msgid "Program library"
+msgstr "程序库"
+
+#: cps/templates/stats.html:9
+msgid "Installed Version"
+msgstr "已安装版本"
+
+#: cps/templates/stats.html:36
+msgid "Calibre library statistics"
+msgstr "Calibre书库统计"
+
+#: cps/templates/stats.html:41
+msgid "Books in this Library"
+msgstr "本书在此书库"
+
+#: cps/templates/stats.html:45
+msgid "Authors in this Library"
+msgstr "个作者在此书库"
+
+#: cps/templates/stats.html:49
+msgid "Series in this Library"
+msgstr "个丛书在此书库"
+
+#: cps/templates/stats.html:53
+msgid "Tags in this Library"
+msgstr "个标签在此书库"
+
+#: cps/templates/stats.html:57
+msgid "Usercount for calibre web"
+msgstr ""
+
+#: cps/templates/user_edit.html:23
+msgid "Kindle E-Mail"
+msgstr ""
+
+#: cps/templates/user_edit.html:35
+msgid "Show books with language"
+msgstr "按语言显示书籍"
+
+#: cps/templates/user_edit.html:37
+msgid "Show all"
+msgstr "显示全部"
+
+#: cps/templates/user_edit.html:45
+msgid "Show random books"
+msgstr "显示随机书籍"
+
+#: cps/templates/user_edit.html:49
+msgid "Show hot books"
+msgstr "显示热门书籍"
+
+#: cps/templates/user_edit.html:53
+msgid "Show language selection"
+msgstr "显示语言选择"
+
+#: cps/templates/user_edit.html:57
+msgid "Show series selection"
+msgstr "显示丛书选择"
+
+#: cps/templates/user_edit.html:61
+msgid "Show category selection"
+msgstr "显示分类选择"
+
+#: cps/templates/user_edit.html:68
+msgid "Admin user"
+msgstr "管理用户"
+
+#: cps/templates/user_edit.html:72
+msgid "Allow Downloads"
+msgstr "允许下载"
+
+#: cps/templates/user_edit.html:76
+msgid "Allow Uploads"
+msgstr "允许上传"
+
+#: cps/templates/user_edit.html:80
+msgid "Allow Edit"
+msgstr "允许编辑"
+
+#: cps/templates/user_edit.html:84
+msgid "Allow Changing Password"
+msgstr "允许修改密码"
+
+#: cps/templates/user_edit.html:90
+msgid "Delete this user"
+msgstr "删除此用户"
+
+#: cps/templates/user_edit.html:101
+msgid "Recent Downloads"
+msgstr "最近下载"
+
+msgid "Latin"
+msgstr ""
+
diff --git a/cps/ub.py b/cps/ub.py
index be802d8e..1eeb212b 100644
--- a/cps/ub.py
+++ b/cps/ub.py
@@ -132,6 +132,7 @@ class Anonymous(AnonymousUserMixin,UserBase):
         self.category_books = data.category_books
         self.hot_books = data.hot_books
         self.default_language = data.default_language
+        self.locale = data.locale
 
     def role_admin(self):
         return False
diff --git a/cps/web.py b/cps/web.py
index 16279616..4f511371 100755
--- a/cps/web.py
+++ b/cps/web.py
@@ -122,13 +122,6 @@ lm.anonymous_user = ub.Anonymous
 
 app.secret_key = 'A0Zr98j/3yX R~XHH!jmN]LWX/,?RT'
 
-LANGUAGES = {
-    'en': 'English',
-    'de': 'Deutsch',
-    'fr': 'Français',
-    'es': 'Español'
-}
-
 
 @babel.localeselector
 def get_locale():
@@ -136,8 +129,9 @@ def get_locale():
     user = getattr(g, 'user', None)
     if user is not None and hasattr(user, "locale"):
         return user.locale
+    translations=[item.language for item in babel.list_translations()]+ ['en']
     preferred = [x.replace('-', '_') for x in request.accept_languages.values()]
-    return negotiate_locale(preferred, LANGUAGES.keys())
+    return negotiate_locale(preferred, translations)
 
 
 @babel.timezoneselector