castillian
Based on population, Chinese Mandarin is the most commonly spoken language in the world. Spanish is 2nd, followed by English and Bengali.
The most commonly spoken languages in Bilbao are Spanish and Basque.
The most common languages spoken in Latin America are Spanish, Portuguese, Dutch and French.
Spanish is the second most common "spoken" language. The second most common language is sign language.
The spanish of Mexico is the most commonly spoken variety in the United States, also called North American Spanish.
Spanish is the most commonly spoken language in Central America, due to the region's history of Spanish colonization. It is the official language in all countries in Central America, with the exception of Belize where English is the official language.
Spanish
MandarinEnglishSpanishHindi-Urdu
Assuming that you don't want five different dialects of Chinese listed off, the five most commonly spoken languages are Chinese, Hindi, English, Spanish, and Arabic.
English, Spanish and French
The most commonly spoken first languages of Anglo Americans are English, Spanish, and French.
English Chinese Spanish Russian Arabic