Aw snap, they were rapping in Spain-Spanish. And Geralt went into some pretty unfamiliar insults in that rap, but I'll see what I can do.
----------
[Dante]
You look like a novice falling into exciting seductions,
I'll give you a couple of important lessons,
to a Fury you must look at her firmly every moment and tell her
she's at the point of dying in a threatening tone.
Hold on, you are Geralt, I am Dante,
this is like a Jedi competing against his own admiral.
I have no competitor, you copied my hair color,
you're second best, you saw my saga and came up arrogant
I am a hybrid of an angel and a demon,
you'll be hunted and sent with your boyfriend.
you can attack with magic because I was going to go sleep,
Ask for help from your mother when you find yourself in the gates of Hell.
To be a hunter you have to be a dark beast,
a witch seduced you and you could not even hunt her.
there is no way to avoid my bullets
because this battle will end with your corpse on my back.
[Geralt]
I don't need to introduce myself, you should know my name
everybody knows me, when there is blood, you know I'm not a normal man
I lost faith, I've killed thousands of demons, I'm coming to get you
I'm not afraid, for my blood only flows fire
after I kill you I'll play with you like a game
A model isn't going to teach me lessons,
so learn to fight and stop changing your hair color
I ask you to please bring me a better opponent,
this demon has what I have in gayness
It seems you didn't learn when you were little
the beating they gave you was for being retarded
strong hand to my old decrepit horse
if even Ciri makes you scared when you she's in front of you
"I live in a caravan, my parents left me
I don't have a f*cking cent, who am I? Dante!"
[Dante]
I carry a demon inside me
that screams 'don't listen to your heart, it's not right'
when you take a lifetime looking for prey
Magic becomes the opposite of what you pray
I carry a demon inside me
that screams 'don't listen to your heart, it's not right'
sword against sword we are the power of the divine
witches and demons who dispute ... when we sleep
---------------
And that's about it.
(Note: I'm pretty sure Geralt called Dante a 'pequeño rocinante'/'little rocinante' but I changed 'rocinante' to 'old decrepit horse' in case that was a Don Quixote reference, 'cuz that's the name of his horse.)