It’s true that I’m drawn more to American English, but I do use spelling of both British and American English

since both are correct.

Regarding this word in particular, “mum” reminds me of food :) Maybe because we call food “mum” when

speaking with children and referring to their food.

It also reminds me of expressions like “yum” and “mamma mia” when looking at delicious food or eating

something super tasty. Therefore I lean towards using “mom” in this case.

In Arabic the word refers to “mother” is neither mom nor mum. In some spoken accents It’s either “mama”,

"ymmah”, "yom" in some parts of Syria, "ammi" in some parts of Jordan and even "nena" as I heard some

Egyptians calling their mothers. I'm so sure there are many other variations that I've never heard of before :))

“Ummi” is how we call our mothers when using Modern Standard Arabic.

My mother is Mum.

In Maine, a New England state, it is not at all uncommon to hear a person address his/her mother as:  

Mum 

Mummie (not to be confused with mummy!)

or

Mumma (somewhat more rural, old-fashioned, and charming)