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.
Livonian language
Livonian has for centuries been thoroughly influenced by Latvian in terms of grammar, phonology and word derivation etc. The dative case in Livonian, for example, is very unusual in a Finnic language. There are about 2,000 Latvian and 200 German loanwords in Livonian and most of the German words were adopted through Latvian. Latvian, however, was influenced by Livonian as well. Its regular syllable stress based on Livonian is very unusual in a Baltic language. In both languages the letter "h" is silent, unlike other Finnic and Baltic languages. Especially as of the end of the nineteenth century there was a great deal of contact with Estonians, namely between (Kurzeme) Livonian fishers or mariners and the Estonians from Saaremaa or other islands. Many inhabitants of the islands of Western Estonia worked in the summer in Kurzeme Livonian villages. As a result, a knowledge of Estonian spread among those Livonians and words of Estonian origin also came into Livonian. There are about 800 Estonian loanwords in Livonian, most of which were borrowed from the Saaremaa dialect.1st Article of the Universal Declaration of Human Rights