This is the complete list of pronunciation rules in polish
standard polish is spoken by everyone and local dialects are spoken by a tiny fraction of the population, but they're not used in schools or officially

meanwhile latin has 6 dipthongs, 11 vowels (which are denoted by just 6 letters! u sometimes doesnt count as a letter and 2 of them are sometimes consonants because uhhh) and has 8 consonant groups with irregular pronunciation

russian has 19 vowels (lol) which are written by 6 characters, have special rules on their pronunciation depending on surrounding letters, may be modified by hard and soft sign and a fuck ton of rules for consonant pronunciation
russian has so many different dialects its speakers may have issue understanding each other

german has 15 vowels which can be written with 9 letters, it has so many consonants that overload a tiny amount of letters that i can't even be bothered fucking counting them and has multiple consonant groups which i'm not even sure if are always pronounced the same
german has a standard subset of the language but throughout different counties and regions there are spoken different dialects which are vastly different

english has no standard for pronunciation whatsoever but the language is impressively pretty much the same everywhere it's spoken with some exceptions