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.
You can say "Ouais, t'as raison !" in French to express "hell yeah, you're right!".
"Yeah, Me neither" in spanish is "Si, yo tampoco".
Boys say no Girls say hell yeah !
hell yeah
Enfierno
"Yeah" is an idiomatic English expression that means "yes". The counterpart in Spanish is "sí".
Sí, eres.
You could say "¿Quién demonios eres?"
Infierno, spanish
Si Como-no
si amigo
¿Quien te crees?