What race has Sorcerers' Tongue as their native tongue?

[EKB]

My house rule/notes for Sorcerers' Tongue is:

Magical language spoken by wizards and supernatural creatures such as Earthkin, Godkin, and Demonkin. Words spoken in Sorcerers’ Tongue are magically understood by any who hear them to the extent that the listeners can understand speech. However, the listeners react toward the speaker at a -1 reaction penalty unless they also can speak the language. Costs 4 IQ points for non-wizards to learn. Wizards pay only 1 IQ to learn it if they have IQ 15 or less and get it for free at IQ 16.

Gloss for the post:
o Wizards under IQ 16 who haven't taken Sorcerers' Tongue as a language know only the bits and pieced needed for their spellcasting, rather than being able to hold conversations and write letters in it.

o The -1 reaction penalty is because Sorcerers' tongue sounds creepy if you are only understanding it via its magic.

o Animals and creatures of like intelligence will have a very limited ability to understand any spoken language, and thus a very limited ability to understand things said in Sorcerers' Tongue.

o Characters with the Literacy talent automatically understand written Sorcerers' Tongue.

o Being able to speak Sorcerers' Tongue does not mean you automatically understand replies made in other language. (That's left for Truespeech.)

o "Earthkin" are basically Fay. "Godkin" are the surviving minor spirits formerly associated with the now-dead gods. Demonkin are greater demons, lesser demons, and demonlings - creatures condemned to the "summoning spell pool" as a punishment for various supernatural crimes.