Not actually spells, but do the same thing
Beastspeaker [General]
Prerequisites: Handle Animal 1 rank
Benefit: Whenever you could learn a language, you may choose to learn the language of one type of animal (such as birds or horses), allowing you to communicate with creatures of that type as if under a speak with animals effect. You may treat these animals as humanoids with an Int score of 10 for the purpose of Bluff and Diplomacy checks. Druids and rangers with this feat usually learn the language of their animal companion.
Special: If a character with this feat gains the ability to speak all languages, this extends to the languages of all animals.
Universal Language [General]
Prerequisites: 4 ranks in Decipher Script, Perform (oratory) or Truespeak OR ability to speak four languages
Benefit: You have learned or developed a mystical language which connects all other languages. Any creature that understands at least one language can understand the Universal Language, though it does not gain the ability to reply in it. Likewise you understand all languages which could be learned by the Speak Language skill, though you may not communicate in them yourself. Illiterate creatures still cannot read. A character with this feat does not take the normal -4 penalty on Bluff checks made to influence a nonhumanoid creature, as long as he incorporates the Universal Language into his bluff.
Special: Creatures who cannot speak the Universal Language increase the DC of checks to copy, memorise or recreate a portion of the Universal Language by +10.
Special: A character with this feat treats Speak Language as a class skill for all classes.
Primordial Language [General]
Prerequisites: 6 ranks in Decipher Script, Perform (oratory) or Truespeak, Universal Language
Benefit: You have learned of a language with even deeper roots than the Universal Language, the Primordial Language. In addition to the benefits of the Universal Language, this language may be understood even by creatures that lack a language of their own (including animals) and you may likewise understand them. Illiterate creatures may read things written in the Primordial Language. A character with this feat does not take the normal -8 penalty on Bluff checks made to influence a creature of animal intelligence, and may make Diplomacy checks against such creatures; he must incorporate the Primordial Language into his attempt to gain these benefits.
Special: Creatures who cannot speak the Primordial Language increase the DC of checks to copy, memorise or recreate a portion of the Primordial Language by +15.
Divine Language [General]
Prerequisites: 14 ranks in Decipher Script, Perform (oratory) or Truespeak, Primordial Language
Benefit: You have learned the true first language, spoken by the gods themselves. In addition to the benefits of the Primordial Language you may communicate even with mindless creatures and inanimate objects, though it takes some time to accomplish (treat as a stone tell effect). You may make Bluff, Diplomacy and Intimidate checks against mindless creatures as if they were not mindless, as long as they incorporate the Divine Language.
Special: Creatures who cannot speak the Divine Language increase the DC of checks to copy, memorise or recreate a portion of the Divine Language by +20.