Hopefully this will be a start. I'm sure I missed a few and some errors may have snuck in.
Initially I tried making appropriate replacements in the foreign language text, but on reflection decided that was probably a bad idea given that I don't speak the languages in question.
I also excluded various OS-specific files for OSs I don't have (Windows), ones that aren't supported any more (DOS) and ones that probably aren't supported (Win32? Haiku?)
I renamed vimtutor to evitutor since it's just a script.
I wasn't able to run all of the tests due to lack of glibtool on macOS, but the ones up until that point passed, and since I only changed documentation hopefully I didn't break any. Apologies if I did.
Ref: #33