Question

In the tempest how does Stephanos reaction to caliban weaken the power that comes from speaking the same language

Answer 1

Stephano is intrigued that Caliban knows the english language yet still views him as a savage animal.

Answer 2

The way that Stephano's reaction to Caliban weakens the power that comes from speaking the same language would be:  Stephano is intrigued that Caliban knows the English language yet still views him as a savage animal.

Stefano refers to Caliban as a 'brave monster'  because of his wild appearance. At first, Stefano thinks Caliban is some sort stupid islander, and he became surprised after hearing Caliban communicate a point with him.