Not being an expert in a field is not a reason to be embarrassed, I don't think? I'll freely admit that I'm not quite sure which language would be spoken there either - several possibilities (Adûnaic, Gondorian Sindarin, a local proto-Haladin dialect, a Gondorian dialect of Westron... or all of those rolled into something complicated and tangled). It's an interesting question to pursue, and now you've got me curious as well - did your research yield anything?