Destroying something is spoken of as eating all of it. Possible meanings are "Destroy my enemies' plans" or "Destroy my enemies." (See: [[rc://en/ta/man/jit/figs-metaphor]])
"Language" here represents what the people were saying to each other, and probably refers specifically to them talking about plans to do evil. Confusing it represents making the people unable to understand each other. Alternate translation: "confuse them when they speak to each other" or "confuse their plans" (See: [[rc://en/ta/man/jit/figs-metonymy]])