I have localized LaunchScreen.xib, through which the LaunchScreen is divided in two parts.
i.e. LaunchScreen.xib(English) and
As user: Samewize pointed out, the User Interface Guidelines advise against localizing text on the Launch Screen.
Avoid including text on your launch screen. Because launch screens are static, any displayed text won’t be localized.
To add to that, as of September 2019, even with localization of asset catalogs (WWDC 2019 Video), I've been unable to localize images that appear on the Launch screen. I'm assuming the Launch screen is statically generated and does not take Localization into account.