BEg2 chapter 13 Fiona’s camp

[Michael Bailey]

“…Japanese staff who claim not to know a word of English beyond “awesome”
and “sucks,” which for a vast range of human endeavor, actually, is more
than enough . . .”

This is a startling statement from a writer, who writes in English,
acknowledging the limits of English words.

I wonder about “more than enough.”
which one would be superfluous?
Or both?