Android: Language Translation replace login name

[ishyca]

Issue path:

• login
• change language setting
• your username get changed back to "login".

  - problem source : grep search for lang.set()

this is a note for me to remember what need to be fixed

[ishyca]

resolved and also remember language preference in localStorage. commit : 8dcadcafce62aca5614fe0197030df7db9fef8b4