No clue, sorry, but I am still stuck back on v3.3, and in that version, a change made in the Root login through the Control Center, was enough to stick with the languange you picked. But, then again, every user you have had to do the same thing. Interesting what changes I have seen, or heard, were made in the v3.4, some of them don't seem to be "progress", or more likely, why certain things don't work like they used to work anymore, stuff.

Hopefully, someone who is actually running v3.4 can assist on this, until I can get upgraded, I am just going to sit back and learn what I am probably going to have to deal with when I do get to this version....

Ms. Cuddles