QDialogButtonBox - translation of standard button text ("OK", "Cancel" etc.)

[will49]

I'm using a QDialogButtonBox in an app that will is being translated into Japanese etc. The text for the standard buttons in QDialogButtonBox such as "OK", "Cancel" etc. doesn't show up in my .ts translation files. I assumed the app was going to use the standard localized text for these buttons from the OS, but it doesn't look like this is done.

Do I have to localize the text for these standard buttons myself? If so, is the correct way to re-set the text for each of the standard buttons with the correct text but use "ts()"? Seems a bit strange to have to do it that way if so.

Thanks