This article explores the complex issue of interlanguage interference in language learning. The analysis looks closely at how interference occurs and highlights the various factors that contribute to its presence. Interference is essentially the interaction of different language systems in the context of bilingualism. It can happen when languages intersect or during the development of a non-native language, leading to deviations from the norm and disruptions in the second language influenced by the native language. Additionally, the article summarizes key sources of interference identified by researchers, contributing to a better understanding of this intricate linguistic phenomenon. Here, a number of productive methods are suggested to prevent it.