Lechitic languages in the context of "Lechites"

Polish (endonym: język polski, [ˈjɛ̃zɨk ˈpɔlskʲi] , polszczyzna [pɔlˈʂt͡ʂɨzna] or simply polski, [ˈpɔlskʲi] ) is a West Slavic language of the Lechitic subgroup, within the Indo-European language family, and is written in the Latin script. It is primarily spoken in Poland and serves as the official language of the country, as well as the language of the Polish diaspora around the world. In 2024, there were over 39.7 million Polish native speakers. It ranks as the sixth-most-spoken among languages of the European Union. Polish is subdivided into regional dialects. It maintains strict T–V distinction pronouns, honorifics, and various forms of formalities when addressing individuals.

The traditional 32-letter Polish alphabet has nine additions (ą, ć, ę, ł, ń, ó, ś, ź, ż) to the letters of the basic 26-letter Latin alphabet, while removing three (x, q, v). Those three letters are at times included in an extended 35-letter alphabet. The traditional set comprises 23 consonants and nine written vowels, including two nasal vowels (ę, ą) denoted by a reversed diacritic hook called an ogonek. Polish is a synthetic and fusional language which has seven grammatical cases. It has fixed penultimate stress and an abundance of palatal consonants. Contemporary Polish developed in the 1700s as the successor to the medieval Old Polish (10th–16th centuries) and Middle Polish (16th–18th centuries).

Silesians (Silesian: Ślōnzŏki or Ślůnzoki; Silesian German: Schläsinger or Schläsier; German: Schlesier pronounced [ˈʃleːzi̯ɐ] ; Polish: Ślązacy; Czech: Slezané) is both a linguistic as well as a geographical term for the inhabitants of Silesia, a historical region in Central Europe divided by the current national boundaries of Poland, Germany, and Czechia. Historically, the region of Silesia (Lower and Upper) has been inhabited by Polish (West Slavic Lechitic people), Czechs, and Germans. Therefore, the term Silesian can refer to anyone of these ethnic groups. However, in 1945, great demographic changes occurred in the region as a result of the Potsdam Agreement leaving most of the region ethnically Polish and/or Slavic Upper Silesian. The names of Silesia in different languages most likely share their etymology—Polish: Śląsk; German: Schlesien pronounced [ˈʃleːzi̯ən] ; Czech: Slezsko [ˈslɛsko]; Lower Silesian: Schläsing; Silesian: Ślōnsk [ɕlonsk]; Lower Sorbian: Šlazyńska [ˈʃlazɨnʲska]; Upper Sorbian: Šleska [ˈʃlɛska]; Latin, Spanish and English: Silesia; French: Silésie; Dutch: Silezië; Italian: Slesia; Slovak: Sliezsko; Kashubian: Sląsk. The names all relate to the name of a river (now Ślęza) and mountain (Mount Ślęża) in mid-southern Silesia, which served as a place of cult for pagans before Christianization.

Ślęża is listed as one of the numerous Pre-Indo-European topographic names in the region (see old European hydronymy). According to some Polonists, the name Ślęża [ˈɕlɛ̃ʐa] or Ślęż [ɕlɛ̃ʂ] is directly related to the Old Polish words ślęg [ɕlɛŋk] or śląg [ɕlɔŋk], which means dampness, moisture, or humidity. They disagree with the hypothesis of an origin for the name Śląsk [ɕlɔ̃sk] from the name of the Silings tribe, an etymology preferred by some German authors.

Sorbs (Upper Sorbian: Serbja; Lower Sorbian: Serby; German: Sorben pronounced [ˈzɔʁbn̩] ; Czech: Lužičtí Srbové; Polish: Serbołużyczanie; also known as Lusatians, Lusatian Serbs and Wends) are an indigenous West Slavic ethnic group predominantly inhabiting the parts of Lusatia located in the German states of Saxony and Brandenburg. Sorbs traditionally speak the Sorbian languages (also known as "Wendish" and "Lusatian"), which are closely related to Czech and Lechitic languages. Upper Sorbian and Lower Sorbian are officially recognized minority languages in Germany.

In the Early Middle Ages, the Sorbs formed their own principality, which later shortly became part of the early West Slavic Samo's Empire and Great Moravia, as were ultimately conquered by the East Francia (Sorbian March) and Holy Roman Empire (Saxon Eastern March, Margravate of Meissen, March of Lusatia). From the High Middle Ages, they were ruled at various times by the closely related Poles and Czechs, as well as the more distant Germans and Hungarians. Due to a gradual and increasing assimilation between the 17 and 20 centuries, virtually all Sorbs also spoke German by the early 20 century. In the newly created German nation state of the late 19 and early 20 centuries, policies were implemented in an effort to Germanize the Sorbs. These policies reached their climax under the Nazi regime, who denied the existence of the Sorbs as a distinct Slavic people by referring to them as "Sorbian-speaking Germans". The community is divided religiously between Roman Catholicism (the majority) and Lutheranism. The former Minister President of Saxony Stanislaw Tillich is of Sorbian origin.

Polish dialects are regional vernacular varieties of the Polish language, and often show developments starting from an earlier stage of the language, often Old Polish or Middle Polish, namely the development of the so-called "pitched" or "slanted" vowels (Polish samogłoski pochylone).

Four major dialect groups (termed dialekt) are typically recognized, each primarily associated with a particular geographical region, and often further subdivided into dialects (termed gwara in Polish). They are:

Upper Sorbian (endonym: hornjoserbšćina), occasionally referred to as Wendish (German: Wendisch), is a minority language spoken by Sorbs in the historical province of Upper Lusatia, today part of Saxony, Germany. It is a West Slavic language, along with Lower Sorbian, Czech, Polish, Silesian, Slovak, and Kashubian. It is now spoken by fewer than 10,000 people, mostly in Budyšin and its immediate countryside.

Upper Sorbian differs from its closest relative, Lower Sorbian (with which it forms the Sorbian subgroup), at all levels of the language system: in phonetics, morphology, and vocabulary. At the same time, the two languages share a number of features that distinguish them from other West Slavic languages—in particular, the preservation of the dual number, the retention of simple past tense forms of verbs, and an especially large number of lexical borrowings from German. Several linguistic features link Upper Sorbian with the Lechitic languages, while in a number of other features it is similar to the Czech-Slovak subgroup.

Silesian, occasionally called Upper Silesian, is an ethnolect of the Lechitic group spoken in Upper Silesia. While having secured some international recognition as a language, there is a debate on whether Silesian is either a dialect of Polish or a distinct language, and if Silesians are either a regional ethnic group within the Polish nation or a distinct ethnic minority that historically emerged, but later diverged from, the Polish people. Some Silesians identify as a regional ethnic group within the Polish nation, while others view themselves as a distinct ethnic minority. Its vocabulary was significantly influenced by Central German due to the existence of numerous Silesian German speakers in the area prior to World War II and after. The first mentions of Silesian as a distinct lect date back to the 16th century, and the first literature with Silesian characteristics to the 17th century.

Linguistic distinctiveness of Silesian has long been a topic of discussion among Poland's linguists, especially after all of Upper Silesia was included within the Polish borders following World War II. Some regard it as one of the four major dialects of Polish, while others classify it as a separate regional language, distinct from Polish. The dispute over the status of Silesian is considered to be of purely political character. According to the official data from the 2021 Polish census, 467 145 people use Silesian on daily basis. Internationally, Silesian has been fully recognized as a language since 2007, when it was accorded the ISO 639-3 registration code szl.

Silesian (Silesian: Schläsisch, Schläs’sch, Schlä’sch, Schläsch, German: Schlesisch), Silesian German, or Lower Silesian is a nearly extinct German dialect spoken in Silesia. It is part of the East Central German language area with some West Slavic and Lechitic influences. Silesian German emerged as the result of Late Medieval German migration to Silesia, which had been inhabited by Lechitic or West Slavic peoples in the Early Middle Ages.

Until 1945, variations of the dialect were spoken by about seven million people in Silesia and neighboring regions of Bohemia and Moravia. After World War II, when the province of Silesia was incorporated into Poland, with small portions remaining in northeastern Czech Republic and in former central Germany, which henceforth became eastern Germany, the local communist authorities expelled the German-speaking population and forbade the use of the language.