Sí. Eso es así. Lo sé. (Yes, that is the way it is. I know.)
Sí. Eso es la derecha. Lo sé (Yes. That is the (direction) right. I know)
There are a dozen translations depending on the exact context of the statement.
That is ok - eso es sí aceptable
Yeah (yes) = Si (accent on the 'i'; otherwise it means 'if')
So, yo tambien.
"Yeah, Me neither" in spanish is "Si, yo tampoco".
Boys say no Girls say hell yeah !
hell yeah
"Yeah" is an idiomatic English expression that means "yes". The counterpart in Spanish is "sí".
Enfierno
Sí, eres.
You could say "¿Quién demonios eres?"
Infierno, spanish
You can say "Ouais, t'as raison !" in French to express "hell yeah, you're right!".
si amigo
Si Como-no
¿Quien te crees?