Dumb me. I forgot to translate the very first line in the ro.txt file and the device displayed two "english" options
OK, so it works. I'll post the translation here as soon as I finish and test it.
Translation done, first round of testing done. If anyone wants to give it a further testing round, the file is attached.
[way later edit]
Removed obsolete version, as V1 was released (see the next post).