Polish Etymology!

[awsohllfegyang]

 Heyyy everyone! Interesting question to ask that, for once, google cannot answer. I need to know where the word "plaża" comes from. Polish meaning beach. It MUST come from a romantic origin, or so i thought after translating into other languages. Playa (spanish), spiaggia (italian), plajă (romanian), plaža (croatian and also macedonian), plage (swedish), pláž (slovak), Platja (catalan). ahhhh driving me nuts trying to hunt this thing down!

Because these are all related if I could get the etymology for one that might answer my prayers. Thanks in advance!