Is it Latin? Which version? See https://en.wikipedia.org/wiki/Latin_alphabet
Or is it all modern non-Cyrillic letters used in Europe that don't have diacritics?
In any case, diacritics are a positive. They're used to make a language as phonetic as possible, which is a net positive. As anyone can attest, learning to pronounce English words (or French, for that matter) is a lot of people wasting a lot of effort, which would be better spent elsewhere!
French (there are quite a few of them - think CA for example) has just as many idiosyncrasies as English when you really get in to it.
It is totally impossible to predict how an unfamiliar written word is pronounced in English, but quite easy in French (barring some ambiguous situations like if a noun ends in “s”.)
By the way, I don’t know what CA means. If you’re referring to the French word “ça”, its pronunciation is completely regular and predictable given the spelling.
[1]: https://en.wikipedia.org/wiki/French_orthography#Sound_to_sp...
[2]: https://en.wikipedia.org/wiki/English_orthography#Spelling_p...
It’s usually (not always) clear how a word is pronounced in French if you know its spelling.