I'm using a custom action "Display Message Box" for an English installer.
If the message box is shown, the buttons are in the OS language, not in the installer language.
This looks a bit strange.
The "Display message box" and "Display error message" custom actions are implemented using system message boxes, so the buttons are localized by the OS using the user's display language.
Yes they are system boxes, but it reduces the user experience when languages are mixed.
As a feature request it would be possible to modify button language for you like demonstrated here: http://www.codeproject.com/Articles/183 ... MessageBox
Thank you for your contribution to Advanced Installer forums. Also, thank you for your suggestion. I have added this improvement on our TODO list and it will be available in a future version of Advanced Installer, but for the moment there are not immediate plans.