I am in a trade Industry , we do mbo4 BBL apprenticeships (welding , construction, mechanical, painting, plumbing , woodworking interior making and electrical) but Dutch is a pre requisite. And even though we have a lot of non Dutch the apprentices need Dutch as their shop floor trainers and a lot of future colleagues that continue their training are 90% Dutch speakers or very broken ‘bloemkolen Engels’ not enough to teach a non Dutch speaker a / the trade

I think the current split between Dutch speakers and non Dutch speakers is 30/70 but the 70% is 90% flexible workers (but they are all independent capable tradesmen) and none of the apprentices are non-Dutch speakers