I think we need friendly documentation that provides the translations folks need, and comments in the definitions file to clarify the stuff that’s really opaque. It’s on my list to do, but it’s pretty far down the queue for me right now. 
Another thing we need are language specific keymaps that map foreign layouts as starting places for the people who don’t use qwerty, Dvorak, or Colemak. They’re developing in various conversations on the forums and I’m watching. Eventually I’ll solicit finished keymaps from folks and get them added to the wiki.