fix loading crash on emoji reacts

src/components/react_button/react_button.js

@@ -62,8 +62,7 @@ const ReactButton = {
         return orderedEmojiList.flat()
       }
       return [
-        ...this.$store.state.instance.emoji,
-        ...this.$store.state.instance.customEmoji
+        ...this.$store.state.instance.emoji
       ] || []
     },
     mergedConfig () {

src/services/locale/locale.service.js

@@ -3,6 +3,7 @@ import ISO6391 from 'iso-639-1'
 import _ from 'lodash'
 
 const specialLanguageCodes = {
+  'en_nyan': 'en-NYAN',
   'ja_easy': 'ja',
   'zh_Hant': 'zh-HANT',
   'zh': 'zh-Hans'
@@ -14,6 +15,7 @@ const internalToBackendLocale = code => internalToBrowserLocale(code).replace('_
 
 const getLanguageName = (code) => {
   const specialLanguageNames = {
+    'en_nyan': 'English (Nyan)',
     'ja_easy': 'やさしいにほんご',
     'zh': '简体中文',
     'zh_Hant': '繁體中文'