"Who are you?" -
"Hola quien eres" translates to "hello who are you" in English.
quien soy: who I am quién soy: Who am I
"yes, what happened? Excuse me, who are you?"
It means, "Do you hear who you are?" It could also be, "Oye tú. ¿Quién eres?" which means, "Hey, you. Who are you?"
It means: "well I don't know. And you? Who are you?"
Where is your friend from
I don't know who you are.
A: and who the f.ck are you?
They mean 'where are you my love' from (looks like text speak - should be 'quien' not 'kien'! and 'and where are you from'.
"Una pregunta" means "a question" in English.
The question "Por que la pregunta mean in English" translates to "Why does the question mean in English?" in English.
"Pregunta" in Spanish translates to "question" in English.