Did you know that since 1944 the aviation industry worldwide has adopted English as its official language?
Early aviation communication used lights to signal aircraft. The military introduced some radio communication during WWII.
In the mid-twentieth century air travel was most common among English speaking countries, which also dominated the design and manufacturing of aircraft and their operations. A 1944 the Convention on International Civil Aviation in Chicago aimed to resolve some of the problems of air travel at the time. One action was establishing English as the language of aviation to avoid misunderstanding and confusion during radio communications and among international crews.