Latgalian language
Originally Latgalians were a tribe living in modern Vidzeme and Latgale. It is thought that they spoke the Latvian language, which later spread through the rest of modern Latvia, absorbing features of the Old Curonian, Semigallian, Selonian and Livonian languages. The Latgale area became politically separated during the Polish–Swedish wars, remaining part of the Polish–Lithuanian Commonwealth as the Inflanty Voivodeship, while the rest of Latvians lived in lands dominated by Baltic German nobility. Both centuries of separate development and the influence of different prestige languages likely contributed to the development of modern Latgalian as distinct from the language spoken in Vidzeme and other parts of Latvia.
Latvian Wikipedia
As of 2022, the Latvian Wikipedia's articles account for approximately /*100 round 0% of all the articles written in a Baltic language, making it the second-largest edition in the family after Lithuanian, which accounts for /*100 round 0%. The most popular articles are "Latvija" (Latvia), "Eiropa" (Europe), and "Latvijas vēsture" (History of Latvia).