Add a property in the translation files to 'lock' a translation

I have a small project (using QWidgets) and in which the AboutQt dialog is shown.

While the AboutQt title is translated into different languages, its text it is not.

In order to have the "AboutQt" text translated in my own language, I put its translation in the TS file of my project. And it works like a charm.

The only side effect is that every time I run lupdate, it marks the translation as vanished since its source is not actually in my own code.

My proposal is to add a type attribute value (in addition to the existing ones) that allows the user to mark a <translation> tag as not to be changed by lupdate.

Could it be possible?