I see a Slovenian person claiming that, I think, but no Poles.
Also, often those "accents" are different sounds. Ș in Romanian is sh, ț is ts, ă is uh, â is a sound which is not present in English (at least not explicitly). You can get rid of them but there's definitely ambiguity. Even French has é which sounds nothing like the French e.
https://news.ycombinator.com/item?id=18688619