Add Chinese Simplified translation

ui/src/i18n/index.js

@@ -2,6 +2,7 @@ import deepmerge from 'deepmerge'
 import en from './en'
 import it from './it'
 import pt from './pt'
+import cn from './cn'
 
 const addLanguages = (lang) => {
   Object.keys(lang).forEach((l) => (languages[l] = deepmerge(en, lang[l])))
@@ -9,7 +10,7 @@ const addLanguages = (lang) => {
 const languages = { en }
 
 // Add new languages to the object bellow
-addLanguages({ it, pt })
+addLanguages({ cn, it, pt })
 
 // "Hack" to make "albumSongs" resource use the same translations as "song"
 Object.keys(languages).forEach(