Communication pilots must demonstrate the ability to communicate in English, which is the international language of aviation communication. This includes the ability to pronounce and interpret words and phrases correctly as required by communication standards.

Yes, English is the official international language of aviation, a standard established by the International Civil Aviation Organization (ICAO). Since January 2026, regulations have expanded to require even more stringent ICAO English Language Proficiency (ELP) certifications for not only pilots and air traffic controllers but also ground operations staff and cabin crew. Pilots must demonstrate "Level 4" (Operational) proficiency or higher to fly international routes. This ensures that a pilot from Brazil and a controller in Tokyo use a standardized set of "phraseology" to prevent fatal misunderstandings. For example, specific words like "Roger," "Wilco," and "Mayday" are used universally. While pilots can use their native language with local controllers in some countries, English is the mandatory "lingua franca" whenever an international flight or an English-speaking crew is involved in the conversation.