Which countries have spanish as their main language?

Here's a list of countries where Spanish is the official language or the most spoken language:

Official Language:

* Argentina

* Bolivia

* Chile

* Colombia

* Costa Rica

* Cuba

* Dominican Republic

* Ecuador

* El Salvador

* Equatorial Guinea

* Guatemala

* Honduras

* Mexico

* Nicaragua

* Panama

* Paraguay

* Peru

* Spain

* Uruguay

* Venezuela

Most Spoken Language:

* Andorra (Catalan is also an official language)

Important Notes:

* Regional Variations: Spanish has many regional dialects and accents, so while the language is officially the same, there can be significant differences in how it's spoken.

* Other Languages: Even in countries where Spanish is the official language, other languages are often spoken, especially in indigenous communities.

Let me know if you'd like more information about the prevalence of Spanish in any particular country!