Confused Languages (Pa)
Type: Hero Enh. • Brigade: Green • Ability: 2 / 1 • Class: None • Special Ability: All Evil Characters in play with banding abilities may not band for the rest of the game. Any already banded must return to their territory. • Play As: Prevent band abilities on Evil Characters in play for remainder of game. Return all banded Evil Characters in battle to territory.
Judging from the play as I'm going to say that they still have to exit battle, because it's a return ability not a negation of banding, but yes since the banding is CNB it also CBP and You can band in later blocks. I could be completely wrong but judging from the play as that should how it's played.
For the first part just an example, If I make a rescue attempt with the 4 TGT girls and TGT up (Making the banding CBN) and My opponent blocks with Goliath it doesn't matter that the banding cannot be negated because Goliath isn't negating the banding he's forcing them to return to territory. Just my 2 cents and I could be wrong. Elders would know better.