Its both
Bomford, he problem is twofold.
1) Poor language skills in English
2) Deliberately (either through laziness, or familiarity or who knows what) using local language to talk to "home" ATC by pilots that are perfectly fluent in English. I make no apologies for pointing out that it has been a recurrent theme on this forum that Spanish and French controllers use local language when landing at their home airports. And don't get PPruners started on preferential treatment by ATC for "home" crews (not in UK).
Your PC might melt.
Last edited by Pinkman; 29th Aug 2013 at 18:11.