The quality of legislative drafting process at European and national levels is highly influenced by the legal drafters control over the multilingual complexity of European legislation and over the linguistic and conceptual issues involved in its transposition into national legislations. The DALOS project aims at ensuring coherence and alignment in the legislative language, providing law-makers with an ontological-linguistic resource and knowledge management tools to support the multilingual legislative drafting process. This paper outlines the current activity within DALOS, aiming at the construction of a two-level knowledge (ontological and linguistic) resource to be used as support for multilingual legislative drafting.