The purpose of this thesis is to evaluate the retrieval effectiveness on the European Unions official website EUROPA, depending on which language is used to formulate the search question. Our main concern were if you get access to the same information depending on which language is used to search information The European Union has so far eleven official languages, and with the forthcoming expansion with negotiations with thirteen new countries to affiliate to the union by May 1:st 2004, the official languages will be even more. We have made a comparison between Swedish and English, using 29 different topics from which we formulated 2x29 queries. The topics used were found at the Swedish Governments FAQ about the European Union, EUsvar. We wanted the topics to be as authentic as possible to avoid bias. Using a DCV, Document Cut-off Value, of 10 we made a relevance check, using a three grade scale, of the retrieved documents. Irrelevant articles and duplicates were given 0 points, partially relevant documents were given 0, 5 points and those judged to be highly relevant were given 1 point. Criteria for these relevance judgements are formulated as to prevent hesitation and partiality. The measure of effectivness used is top ten precision. The results of the survey were mainly positive, the difference in precision between the two languages were very low, meaning that you get mainly the same answers, if not the same documents, to your information need whether you formulate your search question in English or in Swedish.