Can "Linguist" be used to improve "Animal" languages?
I would not think so but what's the official answer?
The way that
Linguist is envisioned is that you gain those ranks in languages that are learnable for your character. That is 2 free ranks of Spoken in 3
additional languages (i.e. languages you do not know, but are capable of learning/speaking).
So, if the character ALSO has the
Major version of the Gift,
Animal Speech, then yes, Linguist could be used to give him 2 ranks in each of 3 new Animal Tongues (it would not apply to the Animal Tongue gained in the
Minor version of the Gift since that only gives 1 Animal Tongue, and not the ability to learn the others).
Since the Animal Tongues do not have Written versions, that benefit of the
Major version of
Linguist would be lost.