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.
Language policy in Latvia
According to Section 6 of Official Language Law, levels of skills in Latvian are defined for various professions, which concern legitimate public interest. Totally, there are six levels and two lists of professions (longer for public sector and shorter for private sector), classified by needed level. For those who didn't get education in Latvian and aren't disabled, an examination is needed to define their skills in Latvian, to work in these professions. Those who fail to show needed level during inspections, can be fined. Labour market shows high demand for skills in Latvian, Russian and English languages.