GlottoScope provides a visualisation of the combination of Agglomerated Endangerment Status (AES) and Descriptive Status of the languages of the world.

GlottoScope was designed and developed by Robert Forkel and Harald Hammarström in 2014. Comments and beta-testing were provided by a number of individuals including Hedvig Skirgård, Martin Haspelmath, Matti Miestamo, Mark Dingemanse, Lyle Campbell, Tapani Salminen and audiences at several demo sessions.

For more information see:

Harald Hammarström and Thom Castermans and Robert Forkel and Kevin Verbeek and Michel A. Westenberg and Bettina Speckmann. 2018. Simultaneous Visualization of Language Endangerment and Language Description. Language Documentation & Conservation, 12, 359-392.

Agglomerated Endangerment Status

The Agglomerated Endangerment Status measures how endangered a language is according to an agglomeration of the databases of The Catalogue of Endangered Languages (ELCat) , UNESCO Atlas of the World's Languages in Danger and Ethnologue.

Descriptive Status

The descriptive status of a language measures how extensive a grammatical description there exists for a language.

For the purpose of the descriptive status Glottolog's regular document types are mapped a more coarse grained Most Extensive Description (MED) type as follows:

MED type Glottolog doctypes # of languages % of languages
long grammar 1646 20.91%
grammar 918 11.66%
grammar sketch 1986 25.23%
phonology/text 971 12.34%
wordlist or less 2350 29.86%