It is as Dr Alf says a highly contentious issue but the question of exports and the need to learn different and useful languages in Europe and the UK is essential if the EU in its present form or as individual countries which make it up, is to start earning and paying its way.
MI5 and MI6 both say that the most important languages for the future are going to be Mandarin Chinese, Brazilian Portuguese (despite Brazil’s present difficulties), and Arabic.
Teaching Arabic in French Primary schools is a sop to Muslims and should be avoided but teaching these three important languages compulsorily within the context of a longer and more demanding curriculum should occur in every school in Europe and the UK at an an appropriate age and be followed by compulsory National Service.
Migrant populations coming into Europe should be required to learn the languages of the host country, in this case French but the tail should never be allowed to wag the dog.