Funny, but so tragically true. The number of accidents/incidents directly related to accents and misinterpretations is mind boggling. There is a reason that ICAO recognizes English as the official aviation language. There are numerous technical means for testing equipment for speech recognition, but the human factors associated with proper use of the equipment is still in its infancy. This is where CRM was spawned in the late 70s to address exactly these types of operational errors.