After upgrading from Unreal 5.4 to Unreal 5.5, my internationalization DialogueWave is not work.

[Isaac_MM]

I was able to solve this by adding

CommandletArguments += TEXT(" -UNATTENDED");

to FLocalizationCommandletProcess::Execute in Engine\Source\Editor\LocalizationCommandletExecution\Private\LocalizationCommandletExecution.cpp

It seems the comandlet is trying to open a message box, but as its running via the UnrealEditor-cmd.exe, that’s not possible.