Ah but we have those too :) The 'rz' phoneme has the same sound as the letter 'ż' which is a different sound from the letter 'ź' (the latter being a softer sou

Ah but we have those too :) The 'rz' phoneme has the same sound as the letter 'ż' which is a different sound from the letter 'ź' (the latter being a softer sound - one that foreigners usually find easier to reproduce). Whether you write a word with the 'rz' or the 'ż' is governed by a set of orthographic rules that are of course peppered with numerous exceptions.