Lox and Salmon are not quiet the same thing. Lox is treated Salmon. So all lox are salmon but not all salmon are Lox. Kind of like all squares are rectangle but not all rectangles are square.

Pretty sure Lox is Hebrew not actually English. Just a word we incorporated because we can buy it at the grocery store.

DO agree with you though should not have been translated at all. Matter of fact I am of the PERSONAL opinion none of the names should be translated unless it results in a insulting word/phrase thru the magic that is multiple languages. But that's just me.