Earlier quoted context omitted.
What about rz, is it same as ř in Czech? Good luck with this letter to any native English speaker. :-))
no, it traces back to the same thing pretty much, but in modern Polish it's indistinguishable from ż (ž?) I assume that long time ago it went like this r' -> ř -> řż -> ż, which effectively removed the foundational r-ness of the thing. Off the top of my head, the Polish language has lost the phonetic distinction between rz and ż -> ż, h and ch -> ch, u and ó (flat u vs long o) -> u In some regional dialects near sout…
dřevo in Czech is actually drevo in Slovak
noga, drugi, bog, you can in all replace g with H and you will have CZ/SK version, seems Polish is in this aspect way closer to Russian with overused G instead H