Cabal language would be grunts, Vex language would be electronic shrieks, and the Hive would be screams.
Until we get a friendly member of each race, like Variks, who provided a baseline to translate from, we know nothing of how their language works. Now if only Ghaul or the Consul or even Calus swore a Cabal curse then we can jumpstart the Cabal language.
EDIT: I hate my phone. It keeps wanting to correct Cabal to Canal. And, the horror, it even changed “Calus swore” to “Value sword”. I caught the mistake, but really Android, you can’t even get that one right?