This is not correct, from September 2006 ALL new hires to KLM must be fluent to level B1 european standard in the Dutch language (If you doubt me Flyburg then check the CLA!). Only the ex UK pilots who were successful at the selection were given the exception (and i quote) "must be fluent to Level B1 european standard before accepting their next function in the KLM".
KLM's hiring practices are BLATANTLY illegal, the way the UK pilots were treated was pure discrimination.
Still the French are marching their way here ;-)