ShowGrouping section has no customizable text.

[michele-bettin]

Before opening it as an issue I would like you to confirm that the ShowGrouping message dialog text "Drag a column header here to group by that column" is not customizable because there is not customizable EditTemplate...
I try with HeaderGroupCaptionTemplate but doesn't work

[David-Moreira]

If I remember correctly you need to provide your own Localizers with what you would like to be overriden with. There should be a localizer there for every text that can be changed.