The code for the counter is very complex tiaxgame
but you can now translate the "none" but so far only
in the type="display1" version using label_0="your translation"
I inherited the xtcat site when mobilestimulus could no longer maintain it and I basically left it alone.
but the whole xtcat thing does seem to be running a little slow which is probably due to the sheer number of files and entries which I think runs to many hundreds of thousands if not millions I will ask the other staff if anything can be done about it like clearing out dead and unused entries