Latvian language
Upper Latvian dialect is spoken in Eastern Latvia. It is set apart from rest of the Latvian by number of phonetic differences. The dialect has two main varieties – Selonian and Non-Selonian. There is a standard language, the Latgalian language, which is based on deep Non-Selonian varieties spoken in south of Latgale. The term "Latgalian" is sometimes also applied to all Non-Selonian varieties or even the whole dialect. However, it is unclear if it is accurate to use the term for any varieties besides the standard language. While the term may refer to varieties spoken in Latgale or by Latgalians, not all speakers identify as speaking Latgalian, for example, speakers of deep Non-Selonian varieties in Vidzeme explicitly deny speaking Latgalian.
Ludza Estonians
By the 19th century the church had become Latvianised and Russian had become the official language and lingua franca. According to Oskar Kallas, who made a studying trip to area in 1893, there were 4,387 Ludza Estonians of whom some 800 could speak Estonian. In the 1970s and 80s, there were some 20 people left in the area still using the language, but it is now most likely to have perished. The dialect spoken by Ludza Estonians, was closely related to eastern Võro-dialects. It contained about 180 loanwords from Latvian language and some from Russian. Ludza Estonians reportedly had some difficulty understanding standard Estonian.