Allow user to explicitly choose extension language

[schmich]

• Locale-specific messages are available to the extension (e.g. at chrome-extension://.../_locales/ja/messages.json)
• We could statically store locale list and allow user to change it in settings
  • "Same as browser" setting (default) - no manual parsing/handling of messages
  • Changing language would require user to reload extension
• Non-default locale
  • We manually locate and parse messages.json
  • Need to override chrome.i18n API or provide shim/proxy for extension to use

From @L1Q in #139:

I like how it's now conveniently translated in my case into russian, but I very much liked english.
Is there a way to force marinara to use english language again?

From Yoko in CWS:

This app is so convenient for me!
But from yesterday, its language had been transformed into Japanese.
Though I'm Japanese, I would like to use this app in English...
Sadly, it seems to be difficult (#139).
I will be happy to change its language freely :)

[omeganc]

I have a similar issue with Chinese (with #139). IT dep had the chrome on my computer installed in chinese and i dont have the right to change it... the translation is kinda weird..? and the fact that its in a different language with my home PC is kinda bothering. i know its gonna be a lot of work tho. can help with the chinese if thats easier!

[schmich]

@omeganc Thanks for the feedback. This is something I would like to fix, but the list of features is large and this is definitely a side project for me, so it might be a while.

I apologize if the translations are weird. Unfortunately, I only know English, so I have to rely on the translation skills of others. If you have the time, contributions and changes are welcome:

• See issue Translation to other languages #78 for general translation guidance
• See the zh_CN (Chinese-China) translations
• See the zh_TW (Chinese-Taiwan) translations

Also, I noticed you just joined GitHub, so if you need help navigating it or figuring something out, let me know. I'm happy to help where I can.

[omeganc]

Thanks for the warm welcome. Im quite interested in the extension language issue here and thats why i opened an account actually. i promise i will take some time to think about it as well and hopefully help you with it. for now i hope my chinese changes will do....