What is a word?

Practices of word segmentation in French and Moroccan Arabic by beginning and advanced bilingual writers in two historically and linguistically divergent settings are analysed in a threefold perspective: (1) In the different sociocultural contexts of linguistically heterogeneous France in the 1870’s and a town with remarkable immigration from Morocco in Germany in 2000, dictations constitute monolingual settings of language policy and normativity; (2) structurally, open and closed spellings of (clitic) function and content words indicate constraints of different orthographies, focussing either phonology or morphosyntax; (3) in the framework of contact linguistics, bilingual students write in one of their languages (French, Moroccan Arabic) with resources of other languages (like Breton, German, Classical Arabic).The results show that the students’ writings are influenced by graphematic structures not directly related to the language dictated. In French Brittany, a great importance of closed spellings may be supported by the agglutinative feature of the Breton language, while the apostrophe as a striking feature of French orthography is used primarily, but often only emblematically, by the students in Gascony. Moroccan Arabic writers in Germany are influenced indirectly by their first school language, German, in the way they mark word boundaries in prepositional phrases (PP) and imperfective verb forms. Classical Arabic, however, remains of marginal influence although both varieties are historically and structurally closely related.