You would use the verb "hacer". Depending on the conjugation (the way the verb changes before the subject) the word will look different.
¿Qué haces?
What are you doing?
This verb also means "to make".
"Hago galletas en la mañana"
" I make cookies in the morning"
"haciendo"
doing or making
my love speak spanish? or "do you speak spanish, my love?"
Hacer
how are you doing
me hace frío
¿Cómo estàs ustedes? is how you say "how are you doing everyone?" in spanish.
"Hello, how are you doing?" in Spanish is "Hola, ¿cómo estás?".
doing or making
"¿Qué estás haciendo?" is how you say "What are you doing?" in Spanish.
my love speak spanish? or "do you speak spanish, my love?"
Doing good = haciendo bueno but this sounds terrible in Spanish. Generally speaking you should say "doing well" which is haciendo bien.
¿Cómo estás?
usted haceindo
cómo estás?
haciendo
Hacer
There are various ways to say "How are you doing?" in the Spanish language. Though the most formal way would be: "Como estas?" = "How are you doing?" "Como has estado?" = "How have you been doing?" :)