Add multiple language support

[george112n]

Needs the ability for the language to be changed by a player.

There preference must be stored somewhere so they don't have to reselect their language when they rejoin the server.

[george112n]

BTE Alps have a language library which is ell implemented and could be useful for this.

We should utilise that.

[DonatiFilippo]

This would require a lot of work tho, as LangLibs ain't aimed as such dynamic use-case

[george112n]

For menus etc it would be fine, though for tutorials themselves it probably wouldn't, we'd probably need our own implementation.

[DonatiFilippo]

Yeah, well, actually as the lib is being rework to accommodate stuff for BTT, this could also be inserted. I'll consider this a bit