Thanks, Mori!
I updated the attached U.F. archive with the correct JS code (for both the 505 and 500), and also the
full image (the link now points to the proper version).
As you can see, it is rather easy to add a language support. For some languages easier, than for the others. I don't know how much more code can you add to the scripts without affecting the performance. So far I haven't noticed any degradation.