Places That Spanish is the dominant Language
Space
Now you might be wondering, "How is there Spanish in Space?!". Well the answer is simple, The ISS (International Space Station). On the ISS there has been over 8 Spanish speaking members.
Europe
In Spain there is only one country in Europe that speaks Spanish, This country is Spain. Spain is the country where Spanish language originated and shares the same relationship that the US shares with Britain. While in Britain its more of a formal version of the English language is spoken and in the US its more relaxed. Spain uses a much more formal version of Spanish while all the other countries that speak Spanish use more of a relaxed form.
Latin America and Central America
Countries in Latin America and Central America that use Spanish as there official language: Colombia, Peru, Venezuela, Ecuador, Guatemala, Cuba, Bolivia, Honduras, Paraguay, El Salvador, Costa Rica, Panama, Chile, Dominican Republic, Nicaragua, Uruguay, Argentina, Mexico.
Africa
There is only 1 country that speaks Spanish in Africa and it is under the name of Equatorial Guinea. Although there are many countries in Africa that use Spanish, It still is not the official language of there countries.