Languages

Most characters seem to speak a common language. Given that only Qum and children seem to speak it improperly, it is apparently well-known by most groups and nations. However, other languages do exist. Untranslated elven and dwarven words are marked in the text with a different color, and the same colors are used to mark conversations entirely in other languages even when the displayed text is in English.

Elven
Text in the Elven language is marked in. You first encounter it when the party comes across a pair of elves in Delgar Forest. Aka knows a bit due to her bounty hunter experience, and when you are able to spend longer time in the elven kingdoms she uses the occasion to practice her skills.

Known words and expressions:
 * : used for greetings and farewells; it means something like "I'm peaceful"
 * : the elven name for the elven language.
 * : exclamation uttered by one of the Delgar Forest elves after spotting Altina among humans, in human gear. It might be a generic expression of (unpleasant?) surprise, but the elf calls her an "apostate" in the very next sentence, so the meaning of the expression might be related to the accusation.
 * : A formal word for "scholar", used as a title.
 * : Some sort of unflattering term referring to the party, perhaps "corrupted ones". Not "outsiders" or "foreigners" though, and probably not "humans".
 * : A term of endearment used by High Priestess Bertricia to address Altina. Given the context it may mean "child", "daughter" or "believer".
 * : "Robbery"
 * : Swear word used similarly to "Shit!"
 * : "Go fuck yourself" (maybe not a literal translation)

The meanings of the elf kingdoms' names are not obvious even to native speakers, as the forms are archaic, but the roots are known to scholars: Darghelon and Gheldaron are respectively "Land of Green Deep Forests" and "Land of Deep Green Forests", and Orilise assumes that Ghenalon means "Kingdom of Deep Roots".

Dwarven
Text in the Dwarven language is marked in. You first encounter it when Megail's group visits Eustrin. It sounds suspiciously Germanic.

Known words and expressions:
 * : "Yes", the same as in German.
 * : "Dwarves"; the singular is unclear.
 * : a greeting.

The names of dwarf countries also seem to share a common suffix: Eustrin and Suorin.

Zirantian
Text in the Zirantian language is marked in blue. It is not encountered until the party visits Zirantia, and even there most seem to speak the main language.

Though the player sees some words of Zirantian, most of it is translated because Simon is fluent in the language and Yarra's party has Fuani.

Other
In the Dark Ruin you can find a text that Yarra says is written in "an ancient succubus language." She's able to read some of it.