Originally posted by hippokrene
Creation is a huge place with six languages.
1e and 2e approach Linguistics in an incoherent manner. Both list the Directional tongues as language families, then state that each contains a range of dialects. A language has dialects; a language family encompasses multiple distinct languages. I have always resolved this by replacing every instance of "dialect" with "language," so that purchasing a dot in Linguistics gives your character access to a range of related (but distinct) languages rather than a range of dialects.
In any case, this broad linguistic base is a convenience for PCs rather than a general setting fact. Just because your character knows every Skytongue language (or dialect!) doesn't mean that every single Northern NPC can manage a conversation with any other Northern NPC. Drop a typical Cheraki citizen into Gethamane and she'll have no idea what's going on, because she most assuredly won't know Gethamanese.
Both editions presume the existence of numerous other languages out beyond the Threshold which do not belong to any of the Directional language families. Neither edition covers the existence of creole languages, but I consider that to be a quirk of the system rather than a statement that Creation lacks creoles.
I cannot speak as to how languages will be handled in 3e.