Comment #0 on 2023-04-12T10:17:23.000Z:
When activating a layer, the related command label is not internationalized. Under some contexts like Capella, when right clicking under an aird they appear as "Redo Show %some_layer_id" instead of the translated label.

Comment #1 on 2023-04-12T10:27:50.000Z:
The issue seems to be in org.eclipse.sirius.diagram.tools.api.command.ChangeLayerActivationCommand

The constructor is implemented as follows:

public ChangeLayerActivationCommand(TransactionalEditingDomain domain, DDiagram dDiagram, Layer layer, IProgressMonitor monitor) {
super(domain, new DDiagramQuery(dDiagram).getAllActivatedLayers().contains(layer) ? Messages.ChangeLayerActivationCommand_hideLabel
: MessageFormat.format(Messages.ChangeLayerActivationCommand_showLabel, new IdentifiedElementQuery(layer).getLabel()));
this.dDiagram = dDiagram;
this.layer = layer;
this.monitor = monitor;
}

The command label is obtained with new IdentifiedElementQuery(layer).getLabel().

It should be encapsulated by a MessageTranslator call like:

MessageTranslator.INSTANCE.getMessage(layer,new IdentifiedElementQuery(layer).getLabel())

Comment #2 on 2023-04-13T12:38:27.000Z:
New Gerrit change created: https://git.eclipse.org/r/c/sirius/org.eclipse.sirius/+/201206