Mutual intelligibility in the context of "Griko"

Sign languages (also known as signed languages) are languages that use the visual-manual modality to convey meaning, instead of spoken words. Sign languages are expressed through manual articulation in combination with non-manual markers. Sign languages are full-fledged natural languages with their own grammar and lexicon. Sign languages are not universal and are usually not mutually intelligible, although there are similarities among different sign languages.

Wherever communities of people with hearing challenges or people who experience deafness exist, sign languages have developed as useful means of communication and form the core of local deaf cultures. Although signing is used primarily by the deaf and hard of hearing, it is also used by hearing individuals, such as those with deaf family members including children of deaf adults.

Chinese (spoken: simplified Chinese: 汉语; traditional Chinese: 漢語; pinyin: Hànyǔ, written: 中文; Zhōngwén) is an umbrella term for Sinitic languages in the Sino-Tibetan language family, widely recognized as a group of language varieties, spoken natively by the ethnic Han Chinese majority and many minority ethnic groups in China, as well as by various communities of the Chinese diaspora. Approximately 1.39 billion people, or 17% of the global population, speak one of the Chinese languages as their first language.

The Chinese languages form the Sinitic branch of the Sino-Tibetan language family. The Chinese government considers the spoken varieties of the Chinese languages dialects of a single language. However, their lack of mutual intelligibility means they are considered to be separate languages in a family by linguists. Investigation of the historical relationships among the varieties of Chinese is ongoing. Currently, most classifications posit 7 to 13 main regional groups based on phonetic developments from Middle Chinese, of which the most spoken by far is Mandarin with 66%, or around 800 million speakers, followed by Min (75 million, e.g., Southern Min), Wu (74 million, e.g., Shanghainese), and Yue (68 million, e.g., Cantonese). These branches are unintelligible to each other, and many of their subgroups are unintelligible with the other varieties within the same branch (e.g., Southern Min). There are, however, transitional areas where varieties from different branches share enough features for some limited intelligibility, including New Xiang with Southwestern Mandarin, Xuanzhou Wu Chinese with Lower Yangtze Mandarin, Jin with Central Plains Mandarin and certain divergent dialects of Hakka with Gan. All varieties of Chinese are tonal at least to some degree, and are largely analytic.

Urdu (اُرْدُو) is an Indo-Aryan language spoken primarily in South Asia. It is the national language and lingua franca of Pakistan. It is also an official Eighth Schedule language in India, the status and cultural heritage of which are recognised by the Constitution of India. It also has an official status in several Indian states.

Urdu and Hindi share a common, predominantly Sanskrit- and Prakrit-derived, vocabulary base, phonology, syntax, and grammar, making them mutually intelligible during colloquial communication. The common base of the two languages is sometimes referred to as the Hindi–Urdu or Hindustani language, and Urdu has been described as a Persianised standard register of the Hindustani language. While formal Urdu draws literary, political, and technical vocabulary from Persian, formal Hindi draws these aspects from Sanskrit; consequently, the two languages' mutual intelligibility effectively decreases as the factor of formality increases.

The Iberian Romance, Ibero-Romance or sometimes Iberian languages are a group of Romance languages that developed on the Iberian Peninsula, an area consisting primarily of Spain, Portugal, Gibraltar, Andorra and French Catalonia. They are today more commonly separated into West Iberian, East Iberian (Catalan/Valencian) and Southern Iberian (Andalusi Romance, also known as Mozarabic/Haketia) language groups. East Iberian's classification is a subject of ongoing scholarly debate, as some argue that the Occitano-Romance languages, composed of Occitan along with Catalan/Valencian, are better classified as Gallo-Romance languages.

Evolved from the Vulgar Latin of Iberia, the most widely spoken Iberian Romance languages are Spanish and Portuguese, followed by Catalan-Valencian-Balear and Galician. These languages also have their own regional and local varieties. Based on mutual intelligibility, Dalby counts seven "outer" languages, or language groups: Galician-Portuguese, Spanish, Asturleonese, "Wider"-Aragonese, "Wider"-Catalan, Provençal+Lengadocian, and "Wider"-Gascon.

Macedonian (/ˌmæsɪˈdoʊniən/ MASS-ih-DOH-nee-ən; македонски јазик, translit. makedonski jazik, pronounced [maˈkɛdɔnski ˈjazik] ) is an Eastern South Slavic language. It is part of the Indo-European language family, and is one of the Slavic languages, which are part of a larger Balto-Slavic branch. Spoken as a first language by around 1.7 million people, it serves as the official language of North Macedonia. Most speakers can be found in the country and its diaspora, with a smaller number of speakers throughout the transnational region of Macedonia. Macedonian is also a recognized minority language in parts of Albania, Bosnia and Herzegovina, Romania, and Serbia and it is spoken by expatriate communities predominantly in Australia, Canada, and the United States.

Macedonian developed out of the western dialects of the Eastern South Slavic dialect continuum, whose earliest recorded form is Old Church Slavonic. During much of its history, this dialect continuum was called "Bulgarian", although in the late 19th century, its western dialects came to be known separately as "Macedonian". Standard Macedonian was codified in 1945 and has developed modern literature since. As it is part of a dialect continuum with other South Slavic languages, Macedonian has a high degree of mutual intelligibility with Bulgarian and varieties of Serbo-Croatian.

Proto-Slavic (abbreviated PSl., PS.; also called Common Slavic or Common Slavonic) is the unattested, reconstructed proto-language of all Slavic languages. It represents Slavic speech approximately from the 2nd millennium BC through the 6th century AD. As with most other proto-languages, no attested writings have been found; scholars have reconstructed the language by applying the comparative method to all the attested Slavic languages and by taking into account other Indo-European languages.

Rapid development of Slavic speech occurred during the Proto-Slavic period, coinciding with the massive expansion of the Slavic-speaking area. Dialectal differentiation occurred early on during this period, but overall linguistic unity and mutual intelligibility continued for several centuries, into the 10th century or later. During this period, many sound changes diffused across the entire area, often uniformly. This makes it inconvenient to maintain the traditional definition of a proto-language as the latest reconstructable common ancestor of a language group, with no dialectal differentiation. (This would necessitate treating all pan-Slavic changes after the 6th century or so as part of the separate histories of the various daughter languages.) Instead, Slavicists typically handle the entire period of dialectally differentiated linguistic unity as Common Slavic.

Persian, also known by its endonym Farsi or Parsi, is a Western Iranian language belonging to the Iranian branch of the Indo-Iranian subdivision of the Indo-European languages. Persian is a pluricentric language predominantly spoken and used officially within Iran, Afghanistan, and Tajikistan in three mutually intelligible standard varieties, respectively Iranian Persian (officially known as Persian), Dari Persian (officially known as Dari since 1964), and Tajiki Persian (officially known as Tajik since 1999). It is also spoken natively in the Tajik variety by a significant population within Uzbekistan, as well as within other regions with a Persianate history in the cultural sphere of Greater Iran. It is written officially within Iran and Afghanistan in the Persian alphabet, a derivative of the Arabic script, and within Tajikistan in the Tajik alphabet, a derivative of the Cyrillic script.

Modern Persian is a continuation of Middle Persian, an official language of the Sasanian Empire (224–651 CE), itself a continuation of Old Persian, which was used in the Achaemenid Empire (550–330 BCE). It originated in the region of Fars (Persia) in southwestern Iran. Its grammar is similar to that of many European languages.

Kurdish (Kurdî, کوردی, pronounced [kʊrdiː] ) is a Northwestern Iranian language or group of languages spoken by Kurds in the region of Kurdistan, namely in southeast Turkey, northern Iraq, northwest Iran, and northern Syria. It is also spoken in northeast Iran, as well as in certain areas of Armenia and Azerbaijan.

Kurdish varieties constitute a dialect continuum, with some mutually unintelligible varieties, and collectively have 26 million native speakers. The main varieties of Kurdish are Kurmanji, Sorani, and Southern Kurdish (Xwarîn). The majority of the Kurds speak Kurmanji, and most Kurdish texts are written in Kurmanji and Sorani. Kurmanji is written in the Hawar alphabet, a derivation of the Latin script, and Sorani is written in the Sorani alphabet, a derivation of the Arabic script.

Armenians (Armenian: հայեր, romanized: hayer, [hɑˈjɛɾ]) are an ethnic group indigenous to the Armenian highlands of West Asia. Armenians constitute the main demographic group in Armenia and constituted the main population of the breakaway Republic of Artsakh until their subsequent flight due to the 2023 Azerbaijani offensive. There is a large diaspora of around five million people of Armenian ancestry living outside the Republic of Armenia. The largest Armenian populations exist in Russia, the United States, France, Georgia, Iran, Germany, Ukraine, Lebanon, Brazil, Argentina, Syria, and Turkey. The present-day Armenian diaspora was formed mainly as a result of the Armenian genocide with the exceptions of Iran, former Soviet states, and parts of the Levant.

Armenian is an Indo-European language. It has two mutually intelligible spoken and written forms: Eastern Armenian, today spoken mainly in Armenia, Artsakh, Iran, and the former Soviet republics; and Western Armenian, used in the historical Western Armenia and, after the Armenian genocide, primarily in the Armenian diasporan communities. The unique Armenian alphabet was invented in 405 AD by Mesrop Mashtots.