The Eastern Iranian languages are a subgroup of the
Iranian languages emerging in
Middle Iranian times (from ca. the
4th century BC) The
Avestan language is often classified as early Eastern Iranian, but this is uncertain.They are divided into a Northeastern and a Southeastern branch. In spite of this separation, Eastern Iranian remained a single dialect continuum subject to common innovation. As opposed to the Middle Western Iranian dialects, Middle Eastern Iranian preserves word-final syllables. Eastern Iranian is thought to have separated from
Western Iranian in the course of the later 2nd millennium BC, and was possibly located at the
Yaz culture.
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