UI Translation Support

[erisu]

The language display is based from the browser's settings. The setting can be accessed by the JavaScript property navigator.language. The NavigatorLanguage.language is supported on all major browsers.

1. If regional language translation exists, it will take first priority. (E.g. en-US)
2. If regional language translation does not exist, but specific language exists, it will take second priority. (E.g. en)
3. It will fall back to the default language when translation is not supplied for the requested language. (default = Chinese)
4. "Translation Error" is returned when an incorrect key is used.

Additional Changes

1. Fixed permission spelling and formatting of the permission error message to match with documentation.