This article analyzes the role of extralinguistic factors in the formation and development of interference in language evolution. It scientifically explains how socio-political, historical, cultural, and educational factors strongly influence the process of change and enrichment in the lexical layer. The dynamics of language development are demonstrated using examples of new terms that emerged in the Uzbek language after independence and lexical units that have fallen out of use from the historical layer. The article also discusses the incorporation of loanwords into the language through colloquial and literary forms, as well as the consolidation of lexical interference in everyday speech. Additionally, the formation of compound verbs in the Samarkand Tajik dialect and the presence of Persian-Tajik and Arabic lexical units in the works of Sadriddin Ayni are analyzed separately. According to the research findings, words borrowed from the Persian-Tajik language make up a larger share of the Uzbek vocabulary compared to Arabic loanwords, and in bilingual environments, a bilingual individual can effectively use the possibilities of both languages without interference.

interference, extralinguistic factors, lexical layer, loanwords, compound verbs, Persian-Tajik lexicon, Arabic borrowings, bilingualism, Sadriddin Ayni, linguoculture.

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