internationalization of interface messages in translate extension

Thanks for the info! For (1) I've found a template [1] that had what I needed, but need to make a landing page to make people able to find their language.

I've read this information yes. I understand that what I asked for is not a part of the Translate extension, just wanted to ask if there is a smooth solution, as you probably have good overview of what is possible to do. My best option now I guess is to make my own drop-down list [2]