Final answer:
In Spanish, the abbreviation for the United States of America is EEUU, which stands for 'Estados Unidos Unidos', reflecting the Spanish practice of doubling letters for plural acronyms.
Step-by-step explanation:
The abbreviation for the United States of America in Spanish is EEUU (Estados Unidos). This stands for 'Estados Unidos Unidos', with the repetition indicating a plural form. The usage of this abbreviation reflects how Spanish forms the plural for acronyms, doubling the letters to show that there are multiple united states. Comparing global affairs, organizations like the Free Trade Area of the Americas (FTAA) have proposed integration of economies within the Western Hemisphere, similar in concept to the European Union, but have faced challenges regarding currency, language, and law, amongst other issues.