Maybe it's because we hear it from others everywhere we go. We probably use it to sound cool or to build more words in a conversation.
Conjunction, “If” is a conjunctional term that begins a sentence with a dependent clause
A personal assistant is someone who assists a specific person with their daily business or personal task. They can have the role of answering phone calls, taking notes, scheduling meetings, etc.
Answer:
I don't know everything but 7 is English if you were born in a country where English is spoken. 9 is Latin I think 4 is bilingual and unfortunately I don't know more