En France, on peut même parler en javanais avec le contrôleur si c'est la seule langue commune pour assurer la sécurité.
Par exemple, l'Allemagne n'a pas notifié de différences à l'OACI pour la radio en allemand.Annexe 10 de l'OACI a écrit :5.2.1.2 Language to be used
5.2.1.2.1 The air-ground radiotelephony communications shall be conducted in the language normally used by the station on the ground or in the English language.
Note 1.— The language normally used by the station on the ground may not necessarily be the language of the State in which it is located. A common language may be agreed upon regionally as a requirement for stations on the ground in that region.
Note 2.— The level of language proficiency required for aeronautical radiotelephony communications is specified in the Appendix to Annex 1.
5.2.1.2.2 The English language shall be available, on request from any aircraft station, at all stations on the ground serving designated airports and routes used by international air services.
5.2.1.2.3 The languages available at a given station on the ground shall form part of the Aeronautical Information Publications and other published aeronautical information concerning such facilities.