Fair point Simon!
I guess from a French speaker’s perspective it’s just that it looks like the grammatical equivalent of “does you speak”, added to the fact that “parle” is pronounced “parl”, whereas “parlez” is pronounced “parlay”, but it’s not like the French don’t mispronounce English or make grammatical mistakes as well... ;)

Hello, the correct French spelling would be “parlez-vous”, as in “voulez-vous”.... The drink itself is a lovely digestif!