List of languages by number of native speakers in the context of "Mutually intelligible"

Spanish (español) or Castilian (castellano) is a Romance language of the Indo-European language family that evolved from the Vulgar Latin spoken on the Iberian Peninsula of Europe. It originated in the Kingdom of Castile, a historical kingdom in north-central Spain. Today, it is a global language with 519 million native speakers, mainly in the Americas and Spain, and about 636 million speakers total, including second-language speakers. Spanish is the official language of 20 countries, as well as one of the six official languages of the United Nations. Spanish is the world's second-most spoken native language after Mandarin Chinese; the world's fourth-most spoken language overall after English, Mandarin Chinese, and Hindustani (Hindi-Urdu); and the world's most widely spoken Romance language. The country with the largest population of native speakers is Mexico.

Spanish is part of the Ibero-Romance language group, in which the language is also known as Castilian (castellano). The group evolved from several dialects of Vulgar Latin in Iberia after the collapse of the Western Roman Empire in the 5th century. The oldest Latin texts with traces of Spanish come from mid-northern Iberia in the 9th century, and the first systematic written use of the language happened in Toledo, a prominent city of the Kingdom of Castile, in the 13th century. Spanish colonialism in the early modern period spurred the introduction of the language to overseas locations, most notably to the Americas.

The English-speaking world comprises the 88 countries and territories in which English is an official, administrative, or cultural language. In the early 2000s, between one and two billion people spoke English, making it the largest language by number of speakers, the third largest language by number of native speakers and the most widespread language geographically. The countries in which English is the native language of most people are sometimes termed the Anglosphere. Speakers of English are called Anglophones.

Early Medieval England was the birthplace of the English language; the modern form of the language has been spread around the world since the 17th century, first by the worldwide influence of England and later the United Kingdom, and then by that of the United States. Through all types of printed and electronic media of these countries, English has become the leading language of international discourse and the lingua franca in many regions and professional fields, such as science, navigation and law.

English is a West Germanic language that emerged in early medieval England and has since become a global lingua franca. The namesake of the language is the Angles, one of the Germanic peoples who migrated to Britain after the end of Roman rule. English is the most spoken language in the world, primarily due to the global influences of the former British Empire (succeeded by the Commonwealth of Nations) and the United States. It is the most widely learned second language in the world, with more second-language speakers than native speakers. However, English is only the third-most spoken native language, after Mandarin Chinese and Spanish.

English is either the official language, or one of the official languages, in 57 sovereign states and 30 dependent territories, making it the most geographically widespread language in the world. In the United Kingdom, the United States, Australia, and New Zealand, it is the dominant language for historical reasons without being explicitly defined by law. It is a co-official language of the United Nations, the European Union, and many other international and regional organisations. It has also become the de facto lingua franca of diplomacy, science, technology, international trade, logistics, tourism, aviation, entertainment, and the Internet. Ethnologue estimated that there were over 1.4 billion speakers worldwide as of 2021.

The Romance languages, also known as the Latin or Neo-Latin languages, are the languages that directly descended from Vulgar Latin. They are the only extant subgroup of the Italic branch of the Indo-European language family.

The five most widely spoken Romance languages by number of native speakers are:

French is an official de jure language in 26 independent nations and 10 subnational territories, making it one of the most geographically widespread languages after English and tied with Arabic. Overall, it is also used as a de jure or de facto official, secondary, or cultural language in about 50 states and territories. It is the 22nd most natively spoken language in the world, and the 6th most spoken by total number of speakers; this disparity reflects the fact that in most countries French serves primarily as a lingua franca or administrative language rather than as a native tongue, which is widespread in only five countries and territories. The following is a list of sovereign states and territories where French is an official or de facto language.

Portuguese (endonym: português or língua portuguesa) is a Western Romance language of the Indo-European language family originating from the Iberian Peninsula of Europe. It is spoken chiefly in Brazil, Portugal, and several countries in Africa, as well as by immigrants in North America, Europe, and South America. With approximately 267 million speakers, it is listed as the fifth-most spoken native language.

Portuguese-speaking people or nations are known as Lusophone (lusófono). As a result of expansion during colonial times, a cultural presence of Portuguese speakers is also found around the world. Portuguese is part of the Ibero-Romance group, which evolved from several dialects of Vulgar Latin in the medieval Kingdom of Galicia and the County of Portugal, and has retained some Celtic phonology.

Russian is an East Slavic language belonging to the Balto-Slavic branch of the Indo-European language family. It is one of the four extant East Slavic languages, and is the native language of the Russians. It was the de facto and de jure official language of the former Soviet Union. Russian has remained an official language of the Russian Federation, Belarus, Kazakhstan, Kyrgyzstan, and Tajikistan, and is still commonly used as a lingua franca in Ukraine, Moldova, the Caucasus, Central Asia, and to a lesser extent in the Baltic states and Israel.

Russian has over 253 million total speakers worldwide. It is the most spoken native language in Europe, the most spoken Slavic language, and the most geographically widespread language of Eurasia. It is the world's seventh-most spoken language by number of native speakers, and the world's ninth-most spoken language by total number of speakers. Russian is one of two official languages aboard the International Space Station, one of the six official languages of the United Nations, as well as the fourth most widely used language on the Internet.

Bengali, also known by its endonym Bangla, is a classical Indo-Aryan language belonging to the Indo-Iranian branch of the Indo-European language family. It is primarily spoken by the Bengali people, native to the Bengal region (Bangladesh, India's West Bengal and parts of Southern Assam) as well as Tripura of South Asia. With over 242 million (24.2 crore) native speakers and another 43 million (4.3 crore) as second language speakers as of 2025, Bengali is the sixth most spoken native language and the seventh most spoken language by the total number of speakers in the world.

Bengali is the official, national, and most widely spoken language of Bangladesh, with 98% of Bangladeshis using Bengali as their first language. It is the second-most widely spoken language in India. It is the official language of the Indian states of West Bengal, Tripura and the Barak Valley region of the state of Assam. It is also the second official language of the Indian state of Jharkhand since September 2011. It is the most widely spoken language in the Andaman and Nicobar Islands in the Bay of Bengal, and is spoken by significant populations in other states including Bihar, Arunachal Pradesh, Delhi, Chhattisgarh, Meghalaya, Mizoram, Nagaland, Odisha and Uttarakhand. Bengali is also spoken by the Bengali diasporas (Bangladeshi diaspora and Indian Bengalis) across Europe, North America, the Middle East and other regions.

Javanese (/ˌdʒɑːvəˈniːz/ JAH-və-NEEZ, /dʒævə-/ JAV-ə-, /-ˈniːs/ -⁠NEESS; Basa Jawa, Javanese script: ꦧꦱꦗꦮ, Pegon: باسا جاوا‎, IPA: [bɔsɔ d͡ʒɔwɔ]) is an Austronesian language spoken primarily by the Javanese people from the central and eastern parts of the island of Java, Indonesia. There are also pockets of Javanese speakers on the northern coast of western Java. It is the native language of more than 68 million people.

Javanese is the largest of the Austronesian languages in number of native speakers. It has several regional dialects and a number of clearly distinct status styles. Its closest relatives are the neighboring languages such as Sundanese, Madurese, and Balinese. Most speakers of Javanese also speak Indonesian for official and commercial purposes as well as a means to communicate with non-Javanese-speaking Indonesians.