Keiner kann ihm im Englischen das Wasser reichen.

Um what does this mean?

Welcome to the forum!
What is the official translation?

It means:

“Nobody is not even nearly as good as he in English.”

“Jemandem nicht das Wasser reichen können” is an expression with roots in the middle ages. Lower class servants where not allowed to come into direct contact with nobles. They were not even allowed to hand them water.

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