This article describes the use and development of the tool for grammar and terminology control FLAG (Alphonse et al., 2002) for automating the process of terminology checking in a major multilingual Swiss organisation. The aim here is not to find new term candidates but rather to show existing terms in new documents to ease the task of term collection. This means showing all the variations of the terms in question in the three national languages, French, German and Italian (see also Jacquemin, 1999). Since FLAG allows a user to find not only strings of characters (i.e. terms) but also to tag and chunk a text and subsequently search for complex patterns, the system was suited very well for this kind of task. For this application, we have developed additional tools that take as input a list of terms and generate two resources which can be directly used in FLAG: (1) a list of correctly inflected terms, and (2) a set of all the patterns which together allow FLAG to find other structural and derivational variants of the terms. In the following paper, we present FLAG and these two components. Finally we discuss briefly their integration in the terminologist's workflow.