During the opening ceremony, I waited for all dialogues and when Rox mentioned “you just said Kuh-Bam” I was a bit confused as Braham didn’t say it, then they had their dialogue about it.
Later rewatching my filmed gameplay I realized that when the pirates arrived Braham finished their run to the fight dialogue with the Kuh-Bam shout.
It really looks like there is some script error and that dialogue about the Kuh-Bam expresion should have happened after Braham shouting it instead of before.