Descriptive-Comparative Foundations era
In the Descriptive-Comparative Foundations era, Ferdinand de Saussure and Henry Sweet stand as representative figures who institutionalized descriptive procedures, with Saussure's framework of synchrony and diachrony shaping later structural linguistics and Sweet's English phonetics and systematic spelling reform guiding empirical data collection. Otto Jespersen advanced the period through comprehensive descriptive grammars of English and other languages, detailing morphology and syntax, while Paul Passy helped standardize phonetics and orthographic practice through the International Phonetic Association. In field-oriented work, Edward Sapir and Leonard Bloomfield contributed empirical methods and data-driven description, with Sapir developing phonology and semantic organization from Native American languages and Bloomfield codifying descriptive linguistics and phonemics in the 1930s. Together these authors established data collection norms, lexicographic conventions, and comparative reconstruction that underpinned subsequent linguistic infrastructures.