International audience—The ambiguity of natural language is an issue which predates requirement engineering. This issue is, in the general case, obviously unsolvable, nor actually needing a solution. However, we think that in particular contexts, it is feasible and desirable to reduce the ambiguity of free text specifications. We look at how specifications are actually handled in a company to be able to propose an useful but not too disruptive method for writing better specifications. We are currently developing and investigating how to validate this method