Hierarchy classification:

1. top of the aat hierarchies
2. Associated Concepts Facet
3. Associated Concepts (hierarchy name)
4. language-related concepts
5. [languages and writing systems]
6. [languages and writing systems by specific type]
7. Indo-European (language family)

Anotations

Scope note:

Baltic and Slavic languages are here groped into a single branch due to the exclusively shared features; developed in the early Common Era with Baltic and Slavic tribes occupying a large area of eastern Europe, including much of present-day Poland and the states of Belarus, Ukraine, and westernmost Russia. The earliest Slavic texts, written in a dialect called Old Church Slavonic, date from the 9th century CE; the oldest substantial material in Baltic dates to the end of the 14th century.