There are many texts on the library that are in the public domain. My suggestion would be to be find a book you like and are interested in spending the time translating and check to see if it's in the public domain. If it's not and you're interested, I don't know the legalese on translations, but that unauthorized translations have been a thing throughout anarchist time. Or you could also contact the author and work with them if they're still around and get the author approved translation.
Good luck, let us know how your translations go.
There are many texts on the…