In general I would say be careful when assigning a specific group in your work accents or regional/ethnic/racial coding. Even if you don't consciously do it, its a very easy trap to fall into. Its something that's been with modern fantasy ever since it was really codified with the works of Tolkien and while it isn't always bad, it can end up bad in execution.
Some specific examples:
-the most famous of all, Tolkien Orcs. Who in private writings are explicitly described with racist language of having
squat, broad, flat-nosed, sallow-skinned, with wide mouths and slant eyes: in fact degraded and repulsive versions of the (to Europeans) least lovely Mongol-types.
, and when writing them he often used a lot of contractives as if to simulate rough and uneducated ways of speaking. Of course there's also a lot of stuff that Tolkien later changed as he grew more uncomfortable with the idea of a race that was irredeemable from birth, but that coding is something that still follows the orcs to this day.
-Warcraft Orcs certainly follow in a lot of the groundwork laid by Tolkien though both the games and spin-off material are certainly more aware of the implications of having a race of intelligent beings who exist only to be fodder for the heroes to kill. In fact in certain books the way characters react to the treatment of Orcs in internment camps (which is also a very loaded concept to play with) is often used to demonstrate if the reader is supposed to sympathize with them or not. Here Orcs are less modeled off of one particular race or group and become more a proxy for displaced peoples/diaspora in general.
-Warhammer 40k Orkz are very interesting to me. Kind of a subversion of the typical Ork and Goblin formula where by all appearances they look like mindless, bloodthirsty, never ending swarms of violent murderers and to Imperium/other Xeno eyes, this isn't incorrect. However from The Orkz perspective, they're doing what they were literally created to do and the only thing that gives them fulfillment, purpose, and pleasure. To them attacking a massive fortress world isn't part of some strategy or grand plan, its because it'll be the most fun thing to have "a propa scrap" over. You'll also quickly notice that these orcs are the most 1:1 coded but as English Football hooligans. Again kind of a subversion of the typical "Orc as Other" we usually see.
Coding is not always bad, sometimes its a useful tool to get information across without bogging the audience down. In shows like Chernobyl and Game of Thrones, accents are used to illustrate things like social class and regional influence all without having to stop the story and explain things. Like in both shows the people of The North for GoT and people in Ukraine in Chenrobyl tend to speak with a more northern English Yorkshire accent, as a way to illustrate their more working class sensibilities.
TLDR: Coding isn't bad, but when used lazily it can turn your characters into stereotypes, so be aware of that.