I know that we can't suggest any splash text additions, but this is about translating them, not suggesting extra text!
Currently, as far as I can tell, we can't translate (using language packs) splash texts or key names (like LEFT CLICK, LCTRL) that come up in options. Would it be possible for these to be added to the language preset? Or can they not be modified?
Things I noticed that weren't translated when working on my Turkish Translation pack:
World exiting text like "Saving chunks"
Splash text on the main menu
Key and Button names in Controls.
"x seconds" for Autosave interval
And probably some more that I've missed.