What is the language of making mobile programs?

Answer 1

java or kotlin for android
objectif-C or swift for ios
xamarin c# for video games
you find react native , scriptnative , angular, ..
for native development and cross platform in the same time
also you can work with html and css but making a web view for your mobile
thank you and good luck

Answer 2

java or c#. those are the most useful.
good luck.