Quoting: muzyka
realise now, that I have a great facility for languages of any kind (speak French too) an am ready to learn a 4th language, perhaps Czech??
That wouldn't make much sense, considering being able to speak Polish you can understand Czech's almost completely. I would definitely suggest Spanish- one of the most widely spoken languages in the world. It will become very useful when travelling, even in the US. You could also try Italian, thats always a fun one to learn. ( plus you can finally undertsand the Pope

when he's speaking in Italy in Italian, on TV a lot these days)
Hmm. I can't really think of any others you should really take. But if you want Czech, go ahead, it would definitely be the easiest to learn.
You could try.......Ethiopian. Up for a challenge? lol