EN
This paper is a review of key aspects of complementary teaching of English and German as a foreign language i.e. according to the DaFnE (German after English) principle that means the sequential constellation of English as the first foreign language and German as the second one (tertiary language). It should be noted that this approach has been developed since the seventies of the twentieth century. From the statistical point of view, German is the second most commonly taught foreign language in Poland, preceded by English. Therefore it would be desirable to develop the DaFnE concept also in this country. The objective of the present paper is to show the advantages of the idea and available reference books in this regard.