I was writing something like: Speaking is an umbrella term itself who encompasses grammar, vocabulary, fluency and accuracy and pronunciation.
Herein lies two problem, 1.can i use who here? 2.does this sentence make sense? i'm not sure if i used umbrella term properly here
Please help me and do not be so pedantic, thanks in advance.
No you can't.
Who is used for people and sometimes for other creatures that are anthropomorphised (or given human personalities in folk tales and sometimes in personal relationships with animals).
You need to use the relative pronoun which or that.
Otherwise, the sentence is fine, except that you require a comma rather than and after fluency.
Speaking is an umbrella term itself (which encompasses) / (encompassing) grammar, vocabulary, fluency, accuracy and pronunciation.
