Translation:My mom is an actress.
The word 'mom' is a colloquialism. i.e. USA
Mam,Mum,should also be acceptable.
Hi, usually Mum is accepted - did you report it? But I think to add Mam would take a lot of work, there's a lot of sentences to update. I read someplace the creators drew the line at Mum/Mom.
edit: there's a comment here