[Ninja]

Available languages to learn in Thay:

Abyssal, Aglarondan, Akurian, Animal, Aquan, Auran
Cant, Celestial, Chessentan, Chondathan, Chultan, Common
Damaran, Dambrathan, Daraktan (Orcish), Deep Speech, Draconic, Drow, Drowsign, Druidic, Duergar, Durpari, Dwarven 
Elven
Ghukliak (Goblin), Gith, Gnoll, Gnim (Gnomish), Grimlock
Halardrim, Halfling, Half-Orc, Halruaan, Hengeyokai, HighShou
Ignan, Illuskan, Infernal
Jotun (Giant)
Kuo-Toan
Lantanese
Magic, Midani, Mulhorandi
Nexalan
Old Illuskan
Rakshasa, Rashemi, Raumvira, Roushoum (Imaskar)
Sahaguin, Serusan, Shaaran, Sylvan
Talfiric, Telepathy, Terran, Thri-Kreen, Treant, Trollspeak, Tuigan, Turmic
Uluik, Undercommon, Untheric
Vaasan
Yipyak (Kobold), Yuan-Ti