Characters start knowing French at 3/6 and typically some other languages at 1/6 (plus extra for high level). Intelligence determines the “some other languages” part. Does intelligence modifier also affect the language skill ratings, so that someone with modifer +1 would start with French 4/6 and other languages 2/6, and someone with intelligence modifier -1 would start with French 2/6 and another language, if any, at 0/6?
In the character sheet intelligence is written as modifying language skills much as various attributes are written to modify the general skills, but I did not find an explicit mention of intelligence modifying language skill ratings in the rulebook.