A list of languages and associated groups are provided in the setting material. A few questions concerning this:
1) Since they are arranged in groups, I then assume that there are similarities among languages in a group and therefore someone can understand group languages at, say, half skill?
2) Probable Typo: Elvish language has elvish alphabet, while Sylvan language has elven alphabet. Assume these are the same alphabet?
3) Possible Typo: The Infernal language has Infernal alphabet while the others in the group have Infernal Script alphabet. Should Infernal language also be script?
4) Probable Typo: Hairan is listed as a language spoken in Nolinos. Should be Samsi (Hairan is country).