Singular ¿Cómo se siente? (Formal)
¿Cómo te sientes? (Informal)
Plural
¿Cómo se sienten?
You say... como te sientes? (if you know them well) or como se siente (in a more formal way of treating someone or someone you don't know that well).
¿Cómo te sientes hoy? is the best way to ask "How are you feeling today" in Spanish.
You simply ask, "How are you feeling?"
"Como estan" in Spanish translates to "how are you" in English. It is a common greeting phrase used to inquire about someone's well-being or to ask how they are feeling.
esta ____?
¿Podría decirme cómo se escribe...?
To ask someone what the word for "airplane" is in Spanish, you would say "¿Cómo se dice "airplane" en español?"
bhi khayegi phir This is a Hindi expression and would make more sense to ask to someone who speaks Hindi, not Spanish.
¿Cómo llego a la gasolinera más cercana?
De donde eres? = Where are you from
To ask what someone is like in Spanish, say, "Como eres?"
If you are talking to someone with whom you are not familiar, you would say ¿Habla español? If you are talking to someone with whom you are more friendly/acquainted with, you would say ¿Hablas español?