By that definition the Seminole of Florida would be considered Hispanic.

Hispanic adjective

His·​pan·​ic | \ hi-ˈspa-nik \

1 : of, relating to, or being a person of Latin American descent and especially of Cuban, Mexican, or Puerto Rican origin living in the U.S.

2 : of or relating to the people, speech, or culture of Spain

https://www.merriam-webster.com/dictionary/Hispanic

This popular dictionary, the American classic, says "of or relating to" things of Spain. The word is first known to have been used in English in 1584, in the second sense seen below. Whereas Latino refers only to Latin American things and was not used in English until the 1940s, adapted from the Spanish language term Latino-Americano. There is a real distinction but some overlap. Many do use the terms interchangeably, while others would rather their language and identities weren't muddied with what you call niggers and Indians or anything having to do with old Mexico. The territory of New Mexico was first 'settled' by people from Spain who never settled anywhere in Latin America and had no intermixing with natives and had no involvement with African slavery. Many were granted land by their sovereigns, the various Kings Philip of the house of Hapsburg who dominated Europe in that era. These settlers established the Capital, Santa Fe, in 1610, a full decade before the Mayflower crossed the Atlantic. There are families in the same territory today who do not consider themselves Latinos in any way. The Webster dictionary quoted above confirms that distinction.

Or should we defer to the ostensibly superior OED?