In an effort to make aliens(non Leviathan derived ones especially) more alien I suggest doing away with sonic based languages for Elcore, Volus, and Hanar.

Elcore were hinted at in canon with their primary communication consisting of a pheromon based language. Why not go all the way? How about their entire language is based off of pheromones and their monotone voices are simply translators for interaction with other aliens.

Hanar could be either sign language or something electronic like stereotypical jellyfish. Not sure about Volus but as they’re covered up in their environmental suits just about anything is possible.

I just realized you could have some hilarious Blasto the first Hanar Specter moments where his translator is saying one thing but his tentacles are saying something else. Oh the possibilities.