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And cherries were ceries from French, leading to the singular form cherry. Lots of neat little things like this.

And peas was both singular and plural like fish.

"I ate a single peas" "I ate many peas"

People thought it was a mistake and generated "pea" for a new singular.

Swedish does a similar thing where it takes the plural of an English word as the singular Swedish loanword.

Kex = biscuit, from "cakes"

Keps = hat, from "caps"

German does it too: ein Keks = a cookie