Аннотация:This chapter concentrates on field research methodologies concerning documentation of the language data of Eastern Iranian languages, notably a group of Pamir languages and Yaghnobi. It focuses on specific fieldwork techniques for the collection and elicitation of language data, as well as on the interpretation, presentation, and storage of the language data of these unwritten languages, enabling the compilation of an archive of audio language materials. The authors analyze part of their field data on Pamir languages, collected between 2006 and 2016. They examine issues surrounding data on enumeration and counting, as well as the traditional system of colour terms and how these are perceived, and selected terminology of traditional span-measurement and units of value in commodities exchange. They also categorize the profile of language consultants participating in fieldwork and present their methodology of data collection. These techniques allow the authors to reveal the worldview of mother-tongue speakers, and the symbols and values significant in their tradition, through the elicitation of ethnolinguistic language data.To achieve these results, the authors stress the importance of a community-based methodology, placing primacy on the relationship with mother-tongue speakers throughout the research process, reinforced through integration into their communities, and thorough understanding of their culture: The authors conclude that although the collection, presentation, and storage of data on unwritten Eastern Iranian languages are valuable assets in themselves, the most important task of the researcher is to interpret and help elucidate speakers’ own intrinsic knowledge, making that knowledge available to their community.