It depends on what country the language was brought to. For example, English was brought from England to the following countries:
Australia
Burmuda
Canada
Jamaica
Zimbabwe
and many others
French was brought from France to the following countries:
Canada
Haiti
Niger
and others
Spanish was brought from Spain to the following countries:
Argentina
Chile
Colombia
Cuba
Guatemala
Honduras
Mexico
Panama
Paraguay
Peru
Uruguay
and others
It is a main language (or co-main language) in the following countries: Germany Austria Switzerland Liechtenstein Luxembourg Belgium
There are multiple countries in Central and South America where Spanish is the main language spoken. El Salvador, Honduras, Nicaragua, Panama etc.
Spanish is Mexico's main language because it was introduced by Spanish colonizers during the colonial period which lasted from 1521 to 1821. As a result of this colonization, Spanish became the dominant language in Mexico and has since been spoken by the majority of the population.
about 115 million, and it is the main language of 33 countries
Normally, the main language is the official language in a country. In countries without an official language, such as the United States, the main language is called the national language.
The language you're looking for is French, but French is not necessarily the "main" language of Francophonie countries.
Germany, Austria and the northern part of Switzerland
Spain and Portugueal were the main colonizers of South America in the 18th century.
Some countries where French is the main language include France, Belgium, Switzerland, Luxembourg, and several countries in Africa such as Senegal, Côte d'Ivoire, and Democratic Republic of the Congo.
Portuguese is the main spoken language in the southwestern country of Portugal. It also is the main spoken language in the South American country of Brazil. And it is the main spoken language in the African countries of Angola, Cape Verde Islands, Guinea-Bissau, Mozambique, and Sao Tome and Principe. And it also is the main spoken language in the Asian countries of East Timor and Macau.
French
Arabic