Could not agree with you more Sean on this. I am a Greek ATCO now working in the UK. The same thing happened in Greece between Atcos and Greek crews and probably still does. It took a flight on a jumb seat and a spare headset some years ago for me to realise how stupid, dangerous and unsafe this practise is! It should be outlawed! In my 21 years in ATC I have witnessed more than one incidents attributed to non standard R/T. No one is going to loose touch with their mother tongue or get a hurt national pride by sticking to English and Standard R/T during work! Play safe!