A good portion of the English Language DID NOT come from Mexico. That is not to say no words did, but a "good portion" most certainly did not.
I suggest before you rewrite the History of the English Language, you actually read texts already written on said subject:
Indo-European and Germanic Influences
English is a member of the Indo-European family of languages. This broad family includes most of the European languages spoken today. The Indo-European family includes several major branches:
* Latin and the modern Romance languages;
* The Germanic languages;
* The Indo-Iranian languages, including Hindi and Sanskrit;
* The Slavic languages;
* The Baltic languages of Latvian and Lithuanian (but not Estonian);
* The Celtic languages; and
* Greek.
The influence of the original Indo-European language, designated proto-Indo-European, can be seen today, even though no written record of it exists. The word for father, for example, is vater in German, pater in Latin, and pitr in Sanskrit. These words are all cognates, similar words in different languages that share the same root.
[snip]
http://www.wordorigins.org/histeng.htm
Spanish, the language spoken in Mexico and most of South America is also comes from Latin.
That's why the call it Latin America.