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Diversity linguistics is the scientific study of human language in its full diversity, going beyond the study of major official languages, focusing in depth on particular lesser known languages or in breadth on comparison, whether structural-typological or historical. Diversity linguistics has existed since the 18th century in a variety of ways, but until recently it has not been conceptualized as a coherent field of study with a community of scholars that are in constant dialogue with each o...
Martín Haspelmath (Tue,) studied this question.