In the "Kreia's Fall" movie, you can see that they're adorned clumps of hair. Yikes, she's an old cow...*shudder*
Insofar as alien languages in KOTOR II, however, I will say that I'm glad to hear the Aqualish speaking their native tongue instead of Ithorian, the Duros sound more like Duros, the Rodians are simirlarly more unique, and the Bith, Quarren, and other aliens also speak their own unique languages instead of KOTOR I's "everyone speaks Huttese but with different inflections from the same guy doing it"...