Change Source for Season Lists/eps missing

I’m wondering if we can add something to update season info/change the season source.
Many anime ive done uses the Japanese season listing, which is fine for most, then you get to ones like Pokemon etc where it just isn’t similar at all for the English to Japanese.

My actual reason for creating this is S03 of RWBY is missing episodes 8-12 in the listing, but the tvdb even lists this, so my question is, why hasn’t this updated, and is there a way we can create a manual update for season listings etc? but yes to be able to change the source would be perfect too.