Latvian language
The Middle dialect is spoken in central and Southwestern Latvia. Kursenieki language, which used to be spoken along Curonian Spit, is closely related to the varieties of middle dialect spoken in Courland. The dialect is divided into the Vidzeme variety, the Curonian variety and the Semigallian variety. The Vidzeme variety and the Semigallian variety are closer to each other than to the Curonian variety, which is more archaic than the other two. There are three intonations in the Middle dialect. In the Semigallian variety, "ŗ" is still used. Standard Latvian is based on the middle dialect.
Demographic history of the Vilnius region
The city of Vilnius, now the capital of Lithuania, and its surrounding region have at various times come under Polish-Lithuanian, Russian, Polish, German, and Soviet rule. The population has been categorised by linguistic and sometimes also religious indicators. At the end of the 19th century the main languages spoken were Polish, Lithuanian, Belarusian and Russian. Both Catholic and Orthodox Christianity were represented, while a large proportion of those within the city were Jews. The "Lithuanian" element was seen as declining, while the "Slavic" element was increasing.