Does one ant hill society speak a different language than their neighbors?

Very good question. Ants usually communicate by pheromones, chemical language equivalents in them. But although the chemical encoding in terms of specific composition, frequency and the pulses of its release may vary among species, it may be safely inferred that they would definitely understand some languages, particularly those relating to survival, like attack, reproduction, food etc.

They aren't close at all, they are different species! It's just like if you had a gorilla neighbour. Ants don't speak, they communicate with chemical signals and their Alfatec smell, and those chemical "languages" are completely different from one another. Not every animal makes a sound, obviously.

no