Common, what did you expect ? read again your questions , one is provocating and condecendent ( French controllers that do not speak english) and the second is plain stupid, of course you will have Thunsderstorms in July anywhere in Europe and a Thunderstorm IS a Cb.
Those kind of questions do show your inexperience .I would have guessed 100h, was not far off. Therefore my comment .No offence in that ,but for me , before starting such a trip, just gain a few more hours before or better take someone with you that know international traffic. The rest of Europe is not like the UK .
Good luck anyway .