Patria Linguae Occitanae forever!
So you think the Occitan speakers would move into Spain and colonize lands freed up by the Reconquista?
Well... why not? I think that Catalan would be one of the Occitan Languages.
Depending on the POD, we might not see the County of Barcelona become a part of Aragon
In that case William Aigret marries Petronilla..but it needs dispensation..