I hope that the goblin will not be a game race, this is nonsense, since goblins are exceptionally evil monsters without free will of non-human origin, this will break the game and only a few will play them. But a temporary goblin companion, if someone really needs him, is quite possible. But I don't need for example.
If you are a goblin, forget about peaceful dialogues, everyone you meet will try to kill you or make you serve (and the funny thing is, this applies to both good and evil), and no romance throughout the game. Its OK?? Nobody will take you seriously. Goblins don't even need a tadpole to be subservient to evil will