I have a character who speaks Orcish and Goblin in addition to Common. He's got a poor Charisma score, so I want to play him as being rather uncouth, adding a liberal amount of coarse language to his speech pattern. However to spice things up I thought it might be fun for him to use his secondary languages in his normal speech.

Are there any good resources for goblin or orcish swear words, or coarse language in general? If not, are there any good resources for the languages in general (so that I can plausibly make some stuff up)? Setting agnostic; the DM is running in his own world but I doubt he would object to be drawing from somewhere else.