This paper reports on an investigation of the Swedish grammatical word av ('of', 'by'), which is overrepresented in Swedish fiction translations from English in relation to Swedish non-translated fiction texts in the comparable part of The English-Swedish parallel corpus (ESPC). The study also incorporates the most significantly overrepresented collocational patterns involving av. Through the investigation it has become clear that the overrepresentation of av is general and significant, and that there is also significant overrepresentation of associated patterns involving lexical as well as grammatical words. The study further indicated that the patterns are mainly due to source language transfer.