“…In general, ranking languages of the world on a scale of complexity is not necessarily very productive or useful by itself. However, such measures are useful, and used for assessing effects of geographic, historical, social, cultural, political and cognitive variables on linguistic differences in specific domains of linguistic structure (e.g., McWhorter, 2001;Kusters, 2003;Bulté & Housen, 2012;Bentz et al, 2016;Bozic et al, 2007;Miestamo et al, 2008;Szmrecsanyi & Kortmann, 2012;Vainio et al, 2014;Mehravari et al, 2015;Yoon, 2017;Berdicevskis, 2018;Brezina & Pallotti, 2019;Chen & Meurers, 2019;De Clercq & Housen, 2019;Ehret & Szmrecsanyi, 2019;van der Slik et al, 2019;Weiss & Meurers, 2019;Michel et al, 2019). Since these studies use complexity metrics as a reference to linguistic differences based on other variables, it is crucial to have objective, precise and well-understood metrics.…”