Digression-
Negro in much of American speech is pronounced nig-ro, not ne-gro.

Dunno how the other English-speaking groups pronounce it. I haven't checked the OED for variants.

In formal ("Castilian") Spanish, negro is pronounced nay-gro, but that varies.
In Mexico, ney-gro, and ney-grah (fem.). Almost an neh- sound.

In referring to people, nigeriano, na is common. The Dictionario of the Real Academia Española remarks that this is applied to people from Nigeria, but many Spaniards would apply it to all Blacks.

I think looking for racism in Tolkien's books is silly.