diff --git a/lib/utils/i18n.js b/lib/utils/i18n.js
index f6001f9e1..de64b49fd 100644
--- a/lib/utils/i18n.js
+++ b/lib/utils/i18n.js
@@ -1,13 +1,13 @@
-var _ = require("lodash");
-var path = require("path");
-var fs = require("fs");
+var _ = require('lodash');
+var path = require('path');
+var fs = require('fs');
 
-var i18n = require("i18n");
+var i18n = require('i18n');
 
-var I18N_PATH = path.resolve(__dirname, "../../theme/i18n/");
-var DEFAULT_LANGUAGE = "en";
+var I18N_PATH = path.resolve(__dirname, '../../theme/i18n/');
+var DEFAULT_LANGUAGE = 'en';
 var LOCALES = _.map(fs.readdirSync(I18N_PATH), function(lang) {
-    return path.basename(lang, ".json");
+    return path.basename(lang, '.json');
 });
 
 i18n.configure({
@@ -18,11 +18,11 @@ i18n.configure({
 });
 
 function compareLocales(lang, locale) {
-    var langMain = _.first(lang.split("-"));
-    var langSecond = _.last(lang.split("-"));
+    var langMain = _.first(lang.split('-'));
+    var langSecond = _.last(lang.split('-'));
 
-    var localeMain = _.first(locale.split("-"));
-    var localeSecond = _.last(locale.split("-"));
+    var localeMain = _.first(locale.split('-'));
+    var localeSecond = _.last(locale.split('-'));
 
     if (locale == lang) return 100;
     if (localeMain == langMain) return 50;
@@ -42,8 +42,8 @@ var normalizeLanguage = _.memoize(function(lang) {
         .filter(function(lang) {
             return lang.score > 0;
         })
-        .sortBy("score")
-        .pluck("locale")
+        .sortBy('score')
+        .pluck('locale')
         .last()
         .value();
     return language || lang;
diff --git a/theme/i18n/jp.json b/theme/i18n/ja.json
similarity index 100%
rename from theme/i18n/jp.json
rename to theme/i18n/ja.json
diff --git a/theme/i18n/zh-cn.json b/theme/i18n/zh-hans.json
similarity index 100%
rename from theme/i18n/zh-cn.json
rename to theme/i18n/zh-hans.json