The paper studies the issues of interference in Tatar ergonyms. The research is based on modern names of Kazan infrastructure objects, forming the linguistic image of the city in the conditions of Russian-Tatar bilingualism. We analyzed the interference phenomena in Tatar ergonyms, taking into account their theoretical comprehension found in scientific literature. The most common errors include incorrect spelling of Tatar phonemes, case endings and word order in a sentence. We have found that the Russian language influences the formation of ergonyms, so there are deviations from the standards of the modern Tatar literary language. Over time, violations of this type can lead to changes in the language norms that may eventually be perceived as part of the existing linguistic norm, making this problem particularly relevant. In a globalized world, it is important to recognize the importance of preserving different languages and cultural identities for future generations. This allows the authors to conclude that the government should take control of the information presented on signboards of the urban spaces, ensuring that it is orthographically correct, semantically accurate and stylistically comprehensible to native speakers. The article emphasizes that the experts, involved in translating the names of various organizations, enterprises, institutions, etc., and information on signs and official website, should be well aware of the requirements for spelling out ergonyms. In the epoch of globalization, the problem of preserving languages, their national-cultural characteristics and the identity of different peoples is of particular importance.