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.
Russian language in Latvia
The number was even lower among young people (between 15 and 34 years of age), of whom 54% said they have a good command of Russian, 38% have a low command, while 8% have no knowledge of Russian. Nonetheless, the proportion of people knowing Russian (98%) was still higher than the proportion of people knowing Latvian (92%). If overall 1% of the respondents with the native language of Latvian did not know Russian, 8% of the respondents whose native language was Russian reported not having any knowledge of Latvian in return.