Slovene. Slovene or Slovenian is a South Slavic language of the Balto-Slavic branch of the Indo-European language family. Most of its 2.5 million speakers are the inhabitants of Slovenia, the majority of them ethnic Slovenes. As Slovenia is part of the European Union, Slovene is also one of its 24 official and working languages. Its grammar is highly fusional, and it has a dual grammatical number, an archaic feature shared with some other Indo-European languages. Two accentual norms are used. Its flexible word order is often adjusted for emphasis or stylistic reasons, although basically it is an SVO language. It has a T???V distinction: the use of the V-form demonstrates a respectful attitude towards superiors and the elderly, while it can be sidestepped through the passive form.

Hungarian. Hungarian, or Magyar, is a Ugric language of the Uralic language family spoken in Hungary and parts of several neighboring countries. It is the official language of Hungary and one of the 24 official languages of the European Union. Outside Hungary, it is also spoken by Hungarian communities in southern Slovakia, western Ukraine (Transcarpathia), central and western Romania (Transylvania), northern Serbia (Vojvodina), northern Croatia, northeastern Slovenia (Prekmurje), and eastern Austria (Burgenland).

Croatian. Croatian is the standard variety of the Serbo-Croatian language mainly used by Croats. It is the national official language and literary standard of Croatia, one of the official languages of Bosnia and Herzegovina, Montenegro, the Serbian province of Vojvodina, the European Union and a recognized minority language elsewhere in Serbia and other neighbouring countries.

Italian. Italian is a Romance language of the Indo-European language family. It is a standardised form of literary Florentine Tuscan and, together with Sardinian, is the least differentiated language from Latin. Current estimates indicate that between 68 and 85 million people speak Italian, including approximately 64 million native speakers as of 2024.