The European institutions must be taken to include the parliaments of the EU Member States as part of a 'European parliamentary system' and they could indeed be described as having not only a national, but also an EU dimension, their role being to ensure a fully democratic Council, which could be regarded as the EU's second chamber, as well as 'bringing citizens closer to Europe'.
Or, parmi les institutions européennes, il faut compter aussi les parlements des États membres. En effet, ces derniers font partie d'un "système parlementaire européen".