I just registered to answer on this thread. Talking as a customer, I currently didnt buy KSP just because its english only. While my normal english is like good enough to chat with you guys, Kerbal's terminology is very specific. This hugely takes from the illusion of "doing all of that" in a game(I managed to test KSP via family sharing). But then, talking as a software developer, I freaking hate internationalization. This is like the last step you want to do in a project. Whatever you do afterwards makes you rage. Most of the IDE's(Development enviroments) do assist you internationalze your yet done stuff, but then dont care if you eg. insert new Strings or assets that need to be localized. You will end up completing the ide-generated mess manually for everything you add, which is really a mule's work.
