I speak a language that is highly colloquialized, and in its casual written format includes a rather inscrutable system of abbreviation (one of the features of this system is to basically omit nearly all vowels). I had always figured that this language would be impossible for machines to translate, but I just tested it and both google translate and ChatGPT can accurately identify the language and translate the slang into English (Google didn’t pick up some of the subtleties between similar dialects, but still provided a correct translation). So I’m somewhat optimistic that they could be potentially managing these problems quite well.