Localization switch in runtime works only one time

Development Programming & Scripting
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1

Hi there!

I’ve got strange behavior with the localization system in UE4 (and 5).
I’m trying to switch the language of my game in runtime. I have two languages (English and Russian) completely filled in Localization Dashboard.

I have an UI with two buttons, each one makes a simple call of the Set Culture function with the correct key.

And this is where things get interesting. It works only once in Editor and in Shipping build. I can switch from the current language to the new one, but not back to the previous one. I’ve got all the correct calls in FInternationalization::SetCurrentCulture, but the game’s text fields are unchanged.

For some reason, it works perfectly if I launch a standalone preview from the editor.
It also works if I restart the game while using the “save to config” check in Set Culture - so the culture is saved correctly and updated after the restart. But not in runtime.

Is this the expected behavior for the localization system? Am I trying to do something that I shouldn’t be doing?

I really appreciate any help you can provide.

2

Example project in 5.1 with basic 3 button change of language

LocalTest.zip (103.8 KB)

The part of setting the language

void UGameInstanceEX::SetLanguage(FString Language) {	
	FInternationalization::Get().SetCurrentLanguageAndLocale(Language);
	
	FCultureRef currentLang = FInternationalization::Get().GetCurrentLanguage();
	FString displayName = currentLang.Get().GetDisplayName();


	bool exists = UGameplayStatics::DoesSaveGameExist("GameSettings", 0);
	if (!exists)
		SaveGame = Cast<USaveGameSettings>(UGameplayStatics::CreateSaveGameObject(USaveGameSettings::StaticClass()));
	else
		SaveGame = Cast<USaveGameSettings>(UGameplayStatics::LoadGameFromSlot("GameSettings", 0));

	SaveGame->Language = Language;
	UGameplayStatics::SaveGameToSlot(SaveGame,"GameSettings", 0);

}


FString UGameInstanceEX::LoadLanguage() {
	FString ReturnLang = "";
	if (SaveGame = Cast<USaveGameSettings>(UGameplayStatics::LoadGameFromSlot("GameSettings", 0))) {
		FInternationalization::Get().SetCurrentLanguageAndLocale(SaveGame->Language);
		ReturnLang = SaveGame->Language;
	}
	return ReturnLang;
}
1 Like
3

Okay, spent another hour on this. Your project works, mine doesn’t. And after trying everything, I’ve found the difference. My default language was not English. I’ve been using “temporary” language as a basic one, so I can freely change both my translations (as far as I’ve read yesterday, I don’t need this anymore). So, I’ve removed it and made English my default language. And now it just works as expected. Wow :smiley:

Thank you.