The research reported in the article investigates sociolinguistic factors of ethnic identity change and identity strengthening, as exemplified on the processes of ethnic revival in the regions of Upper Silesia and Cashuby. The article compares selected aspects of synchronic and diachronic situation of the two ethnolects in Poland: Cashubian and Silesian. The analysis singles out some focal points around which ethnic identity tends to concentrate, for example identity bonds, official inscriptions, language of instruction. The identity strengthening strategies in the respective ethnolects are then compared and discussed. The framework is based on sociological and anthropological theories, e.g.rational choice theory, functionalism as well as on the semiotic rich-get-richer principle, the paradigm of visual anthropology and the technique of visual essay.