It’s possible using this function:
#if PLATFORM_ANDROID
#include "Android/AndroidPlatformMisc.h"
#else
#include "Internationalization/Culture.h"
#endif
...
FString Language;
#if PLATFORM_ANDROID
Language = FAndroidMisc::GetOSLanguage(); //for Android devices
#else
Language = FInternationalization::Get().GetCurrentLanguage()->GetName(); //for PC
#endif
Hope it can help someone, I used it on Meta Quest Oculus and it works great