Speaking any language, that is non-European, at the airport in Europe and sometimes in the America too, may send you in police custody. The problems are bigger for Asian people especially for west Asians.
Neha Vishwanathan has written a post on the danger of speaking the other languages at airports. Be it Seattle, Amesterdam and Heathrow, people have been detained under suspicion and later freed on many ocassion.
The most important and never understood logic is that why the western security agencies, all the time, relate only non-European languages with terrorism.
