East Baltic languages

The East Baltic languages are a group of languages that along with the extinct West Baltic languages belong to the Baltic branch of the Indo-European language family. The East Baltic branch has only four living languages—Latvian, Latgalian, Lithuanian, and  Samogitian. It also includes now-extinct Selonian, Semigallian, and possibly Old Curonian.

Lithuanian is the most-spoken East Baltic language, with more than 3 million speakers worldwide, followed by Latvian, with 1.75 million native speakers, then Samogitan with 500,000 native speaker, and lastly Latgalian with 150,000 native speakers.

History
Originally, East Baltic was presumably native to the north of Eastern Europe, which included modern Latvia, Lithuania, northern parts of current European Russia and Belarus. Dnieper Balts lived in the current territory of Moscow, which was the furthest undisputed eastern territory inhabited by the Baltic people.

Traditionally, it is believed that Western and Eastern Baltic people had already possessed certain unique traits that separated them in the middle of the last millennium BC and began to permanently split between 5th and 3rd century BC. During this time, Western and Eastern Balts adopted different traditions and customs. They had separate ceramics and housebuilding traditions. In addition, both groups had their own burial customs: unlike their Western counterparts, it is believed that Eastern Balts would burn the remains of the dead and scatter the ashes on the ground or nearby rivers and lakes. It is also known that Eastern Balts were much more susceptible to the cultural influences coming from their Baltic Finnic neighbours in the northeast.

Linguistic features
The East Baltic languages are less archaic than their Western counterparts with Latvian being the most innovative Baltic language. In part due to the influence of Baltic Finnic languages on Latvian development, such as in the case of stress retraction. The extinct languages of the Eastern family group are poorly understood as they are practically unattested. However, from the analysis of hydronyms and retained loanwords, it is known that Selonian and Old Curonian languages possessed the retention of nasal vowels *an, *en, *in, *un. It is noted that Selonian, Semigallian and Old Latgalian palatalised soft velars *k, *g into *c, *dz while also depalatalising the sounds *š, *ž into *s, *z respectively. This is observed in hydronyms and oeconyms (e.g. Zirnajai, Zalvas, Zarasai) as well as loanwords preserved in Lithuanian and Latvian dialects. It is believed that Semigallian possessed an uninflected pronoun, which was the equivalent to the Lithuanian savo (e.g. Sem. Savazirgi, Lith. savo žirgai, meaning 'one's horses'). East Baltic would in many cases turn the diphthong *ei into a monophthong, pronounced like the contemporary Latvian jē and Lithuanian ė. This would further develop in Lithuanian and Latvian to become the present diphthong *ie (e.g. Lat. dievs, Lith. dievas 'god'). This innovation becomes obvious when comparing ablauted words of the same root, where o-grade words do not reflect this change (e.g. Lat. ciems, Lith. kaimas 'village'). Unlike their Western counterparts, East Baltic languages usually tend to keep their short vowels *o and *a separately (e.g. Lat. duot, Lith. duoti 'give' as opposed to Lat. māte, Lith. motina 'mother').