Do you write mum and dad with a capital letter at the start for English?

In English, "mum" and "dad" are typically not capitalized unless they are:

* Part of a proper name: Like "Mum's birthday" or "Dad's car."

* Used in direct address: Like "Mum, can I have some cookies?" or "Dad, where are my keys?"

* Used as a title before a name: Like "Mum Mary" or "Dad John".

In general, "mum" and "dad" are treated as common nouns and are not capitalized.