Hi Martynika, welcome to the SWDB!
A couple of points, for your benefit:
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The gentleman to whom you initially replied hasn’t posted here in over ten years so you’re unlikely to get a response from him, although you are of course still welcome to debate the point in a general sense.
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Our membership is made up of people from all corners of the globe and all are welcome, but we mostly tend to communicate with one another in English since it’s the language most commonly understood by the membership. There is no specific rule forbidding you to post in your native or other preferred language but you might struggle to engage other users going forward. That’s up to you, though. There is a section of the forums dedicated to non-English-speaking members, incidentally, with a thread dedicated to our Polish friends:
Anyway, welcome once again, amigo! 