Aoyama-sensei, in British English it's spelled M-U-M, and not M-O-M
Also, incompetent editors, OMG. Had a whole chapter set in the UK and they can't be bothered to get someone actually proficient in English to check.
One of the scanlations cleaned up the English dialogue, but originally a lot of the English dialogue in the bilingual bubbles (that Aoyama-sensei must have written himself) are grammatically incorrect or just actually gibberish and made zero sense.