Translate the extension.

[krtek4]

Here are the languages of the users according to analytics:

• German 11% PR merged, thanks @thormeier
• Polish 7%
• Korean 3%
• Japanese 2.5%
• Dutch 2.2% PR merged, thanks @acrobat
• Russian 2%
• Spanish 1.6%
• Czech 1.1%
• Italian 1% PR merged, thanks @AceGentile

Obviously, any other translation is also welcomed.

There are more or less 25 translation keys, mostly single sentences or smaller.

All strings currently in the application can be found with description on GitHub: https://github.com/krtek4/MultiPass/blob/master/_locales/en/messages.json