For the Oracle Curse, you get the following boon at the 5th level.
Quote:
pick an additional language to speak in combat and add it to your list of known languages
Does this need to be from the "one of the following languages" like your default does? I don't see anything specifying it has to be (or, indeed, can't be a "secret" language).
Flavorwise I can see a case for both interpretations.
