The Mistranslator is fun; I'll suggest it to the GM. Two of the party members have the Lingusitic's skill. The GM's been letting us use that for partially interpretting what the odd speaker has been saying. That's outside of the, strict, skill description, but it seems a bit limited as far as its name suggests. We've gotten away with using Sense Motive a time or two as well to try and get a feeling for how the babling PC is feeling.