Research on foreign language writing has not yet analysed execution – i.e., the orthographic planning and motoric realisation of the text – to a greater extent, although this factor influences writing fluency and thus the prospective quality of the writing product. This paper presents the results of a study in which students with German as a first, second or foreign language copied sentences and word groups in German and in English. The processes were recorded with the help of keylogging-protocols which were analysed statistically. The results demonstrate that the performance in the low-order writing process of execution differs between the groups and between the languages. This stresses the need for training execution in foreign language teaching in order to foster writing fluency and, in turn, the potentials of using writing for supporting understanding.