It could be a fair assumption to state that borderline cases may be of some relevance to the study of normal ones, or, to put it less loosely, the regularities or characteristic traits of what is taken to be normal are better seen when faced with ‘non-systematic’, ‘abnormal’, or ‘special’ phenomena of the same category. This article attempts to list some of the borderline cases of translation that the author has in mind. The list presented is by no means exhaustive or systematic, but the author hopes that it may facilitate further work on this subject.