The World Atlas of Language Structures (WALS) is a large database of structural (phonological, grammatical, lexical) properties of languages gathered from descriptive materials (such as reference grammars) by a team of 55 authors.
M. Schwab, R. Jäschke, и F. Fischer. Proceedings of the 6th International Conference on Natural Language and Speech Processing, стр. 99--109. Association for Computational Linguistics, (2023)