There was one comment under the Home Depot thread
about nation names that needs clarification.

One comment was that there are several United
States of .............. That isn't true as far
as I can tell. There are only two.

There is The United States of American and the
Estados Unidos Mexicanos which can be translated
as the United States of Mexico, but is more often
written the United Mexican States. Thus the
abbreviations in English are the USA and UMS or in
Spanish the EUM.

The common shortening of USA is America (thus the
citizens (nationals) are know as Americans) and
the common shortening of the EUM is Mexico and the
nationals are know as Mexicanos.

Brazil, unless it has changed in the last year or
so is the Republica Federativa do Brasil or in
English the Federative Republic of Brazil.