Swahili is the most widely spoken language in the Niger-Congo language family, if the total number of speakers, rather than total number of native speakers is used as the primary determinant. It is spoken in Tanzania, Kenya, Congo, Rwanda, Burundi, and several other east African countries. It is the Lingua Franca of southeastern Africa.

Persian is part of the Iranian language branch of the Indo-European language family. Yiddish, a High German language, and Sanskrit, an ancient Indian language, are the only other languages on this list that are part of the Indo-European language family. Hebrew is a Semitic language, part of the Afro-Asiatic language family, and Tibetan is part of the Sino-Tibetan language family.

All of these languages are part of the Sino-Tibet family of languages except Russian, which is a variety of Old Slavic, which is part of the Indo-European language family. The Sino-Tibet language family is concentrated in east and southeast Asia. If it helps you remember “Sino” means concerned with or related to China.

Creole languages are formed by the combination of two or more languages. When this newly combined language becomes the primary language of the people in a region it is called a “creole” language. Such a situation has often arise in human history in places where indigenous people and colonizers live in close proximity. Creole languages are common in the Caribbean and various regions of the Americas in general.

Venezuela has one national language, Spanish. There are a few dialects of Spanish and some tribal creole languages using Spanish, but overall this country is not influenced by multilingualism.

Belgium is a country which has three national languages; French, Dutch, and German. The people of this country are very much influenced by multilingualism, having to use all three national languages in the government's affairs.

The United States is a "melting pot" of language. With immigrants from all over the world, multilingualism is a growing influence in the country.

Cyprus is a country that has two national languages, Greek and Turkish. The country is divided by the two language groups. Multilingualism in Cyprus influences many conflicts for the country.

Africa is not a country. Also, the continent of Africa has a plethora of languages and often has conflicts due to the influence of multilingualism in the region.

Indo-European, the language family that includes all European languages (which are widely spoken in Europe, the Americas, Africa, and Australasia) and Indian and Iranian, is spoken by slightly over fifty percent of the world’s population. The next largest is Sino-Tibet which is spoken by close to a quarter of the world’s population.

A “pidgin” language often emerges when two or more languages coexist in a small geographic area. It involves the natural combination of two or more languages into one fluid and changeable dialect. Pidgin’s are often incomprehensible to speakers of the original languages, and may even contain some words that are completely unrelated to either of the languages. By their nature pidgin languages are generally fluid and transitory.

“Esperanto” was the name given to a universal second language created by the Polish linguist L.L. Zamenhof. Zamenhof took elements from a wide variety of different languages and combined them into one language: Esperanto. The primary intention was to provide a universal second language that people all over the world could use to communicate with one another.

The Hellenic language branch is a part of the Indo-European language family. Greek is the only major language in the world that falls under the category of Hellenic. The name “Hellenic” comes from the Greek word for their own country "Hellas."

The word “Nostratic” is used to describe a hypothesized proto-macrolanguage family that was spoken by people somewhere in Asia roughly fifteen thousand years ago. According to the theory, all Indo-European, Dravidian, Afro-Asiatic, Uralic, and Kartvelian languages derive from this one macrolanguage. The theory is widely contested by many geographers, but is extremely influential in the field of linguistic geography.