This thread has my approval. "Mom" is not a word.
My theory is that when some British people first went to America, they caught a cold and their voices went a bit nasal. People gradually adapted to using the nasal voice fr all words, including messing up a load of spellings such as "mom", "color", "flavor", etc.
Language is free, you can't change it with silly threads like this. The sooner you realise this the sooner you will sleep easy at night.
My Northern Irish grandma writes 'Love Mom' on cards to my mum/dad. I use mum for my own mother though I occasionally call her mam.
Usually I am quite a grammar/spelling nazi, but I really don't see why people get *so* annoyed about what's basically a nickname/affectionate term that will be dictated by your family traditions - we have gran/granny/grandma/nan/nanny/nana/various other forms based on different languages, no-one seems to mind about those.
My bf spells it like Mom, it annoys me in texts, but he dies say it in a British way.
He is from Devon after all lol
Developed from chavs, they don't want to use ye olde English phrases and terms in the 21st century.
Americanisation annoys me too, I say mum, by the way. Today in Chemistry today people were spelling sulphur as sulfur, it's just not on!!!
It's a different dialect, deal with it.