The development of digital technology has led to the emergence of new and convenient tools for documenting and preserving endangered idioms. These include languages, dialects, and other language variants whose standard forms are highly active. The study presents a comprehensive analysis of the Electronic Text Corpus of the Linguistic Culture of the Northern Angara Region (CLCNA), focusing on its structure, composition, and functional potential. The relevance of this study stems from the need to preserve regional variants of the Russian language and associated cultural practices in a rapidly changing world. The purpose of this study is to describe the corpus as a valuable tool for humanities research, providing a detailed overview of its structure and features. The study relies on data available on the official corpus website, including information about its structure, metadata, and descriptive elements. Using descriptive analysis, corpus linguistics, and content analysis techniques, the author provides a thorough description of the CLCNA’s three-tiered structure, including dialectal, folklore, and multimedia subsets. The findings of this research contribute to a better understanding of the corpus’s capabilities and potential applications in various fields of study.; A description of the unique system of multi-dimensional manual annotation (spatial, temporal, genre, thematic, conceptual, and plot motif); an analysis of the functional capabilities of the online platform for complex search; and an assessment of the scientific significance of the corpus based on previous research in the fields of communicative dialectology, ethnolinguistics, and folklore studies. The study concludes by emphasizing the role of CLCNA as a key resource for preserving the intangible cultural heritage of the Northern Angara Region and its potential in educational, lexicographic, and technological projects.