Bug 306576 Externalization/translation of strings in xmi files
Currently our e4xmi files have various hard-coded English strings that are presented to the user (in particular the "label" attributes). Is there some mechanism already defined for externalization/translation of NLS strings from these xmi files? If not, we need to define one. Creating a new xmi file from scratch for each language won't scale, and won't allow switching languages after the product is installed.
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/workbench/UIEvents.java
public static final String TOPIC = UITopicBase + "/ui/UILabel"; 
		public static final String ICONURI = "iconURI"; 
		public static final String LABEL = "label"; 
		public static final String TOOLTIP = "tooltip"; 
	}
	public static interface HandledItem {
		public static final String TOPIC = UITopicBase + "/menu/HandledItem"; 
		public static final String COMMAND = "command"; 
		public static final String PARAMETERS = "parameters"; 
		public static final String WBCOMMAND = "wbCommand"; 
	}
	public static interface Item {
		public static final String TOPIC = UITopicBase + "/menu/Item"; 
		public static final String ENABLED = "enabled"; 
		public static final String SELECTED = "selected"; 
		public static final String TYPE = "type"; 
	}
	public static interface Menu {
		public static final String TOPIC = UITopicBase + "/menu/Menu"; 
		public static final String ENABLED = "enabled"; 
	}
	public static interface MenuContribution {