All of the men go quiet for a second and look back and forth at each other and the stowaway. Mostly, they're surprised to have a boy sneak on their ship speaking their native language. This far south, it was rather unexpected. After that, it's mostly disbelief that the whelp could actually be saying what they're hearing. After a few beats, they all laugh.
The man closest to Bastiaan pockets his knife and the mermaid he was carving. He laughs and looks the young man over. "//You are Dutch? What are you doing so far from home, Captain Rat? And how are you going to make this ship yours?//"
He looks to the other men who are moving in closer. "//See here? We'ver let that English fop Captain us, now even cabin boys think they can take the helm from us!//"