The product information sheet fiche has to be written in a language which can be easily understood by consumers and other end-users, as determined by the Member State concerned.
Disclaimer: Please note that the European Commission cannot provide a legally binding interpretation of the EU legislation, as this is the sole competence of the European Court of Justice. Any remarks from the European Commission services are without prejudice to the position the Commission might take should related cases arise in a procedure before the Court of Justice.