This study aims at investigating the important role that language plays as a medium of legal norms and cultural values as surfacing in documents in the United Nations system. The author focuses on diplomatic documents (bi- and multilateral treaties and correspondence) that simultaneously have official status ("authenticity") both in Arabic and in other languages. The investigation of the role of language as a window onto culture and religious background is especially relevant in the case of Arabic due to the interference of religion with law in most Islamic societies. More specifically, problems will be pinpointed in the realms of personal statute law, the legal status of women, the laws of marriage, divorce, inheritance, freedom of opinion and religion, and penal law. At the heart of this study Edzard applies Speech Act Theory to the analysis of the nature and consequences of textual differences between versions of one and the same document in several languages.