Hi t0mas, I've been trying to teach bosnian children and adults on Win and DOS a while ago. We had the same problem, but we've instructed them to learn the english command's names and write help doc's on these. Though they've learned the commands as they are, but knew what they do in their own language, thus they didn't need to be native english speakers. Even while they learned English in parallel courses. And I think, you don't have to understand the name of that command, but you need to know what it means, or in other words: How did you learn things like : ls -r. b.t.w. if you teach your son swedish perl you will have to teach him the english one later on anyway.