The quality of the English translation is good, I suppose...after all I'm no expert on Japanese :D so I wouldn't know. And if I understood correctly, you did a conversion from US version, right ??
Getting back to gameplay, the only problem I encountered so far is with licence boards, but as you wrote they're yet to be done. I went all over Rabanastre and didn;t find any issues. I'll play a couple of hours more this evening.
And by helping I meant the Polish translation, after all it's helluva text...if you're interested of course ;)