Orcish is the default language of the Orcs, some Orc adjacent cultures (as with some Orges), and other creatures of similar allegiances. While some may find the language coarse and tough on the tongue, orcish dialects are rife with nuance and placement. To this end, Orcish in some places can be considered a language of song as well as a language of battle.
Other times, Orcs are just orcs. They speak orcish and that's about it.
List of Ancestries that speak Orcish natively
Regions where Orcish is spoken natively