In 2026, fluency in English remains the absolute mandatory requirement for almost every international airline, as it is the official language of global aviation. Whether you need additional languages depends on the airline. For "flag carriers" like Air France, Lufthansa, or Emirates, being bilingual (e.g., French/English or German/English) is often a requirement or a massive competitive advantage. For U.S.-based carriers like United or American, additional languages are not strictly required for domestic routes, but they have dedicated "Language of Destination" (LOD) positions. These crew members receive extra pay and priority for international routes if they can speak the language of the destination (such as Japanese for a Tokyo flight). In 2026, even for low-cost carriers, knowing a second language is highly valued during the recruitment process as it enhances customer service and safety communication. If you are aiming for a career with a global airline, being multilingual is the single best way to stand out from thousands of applicants.