"Riñe urnes."

[TylerGilli]

i put 'a girl sees'

[Garrldack]

Why is "he" the subject of the sentence?

[G-vei]

It can be any third person singular, "he, she, it". It's a matter of context.

[GodofChaos19]

Right but there is no context for a he to be there. There is only Riñe

[G-vei]

"Riñe" is the direct object form of "riña". Acceptable translations are:
He sees the girl.
She sees the girl.
It sees the girl.

If the translation is "A/The girl sees." , then the phrase would be:
"Riña urnes."
Hope that helps.