Bug 205876 "Preview","Description" on Chart Sample View are not externalized.
"Preview" and "Description" label on Chart Sample View are not externalized so they are dislayed in English. Please check the attached screen shot for detail. I think its hard coded in ChartExamples.java.
chart/org.eclipse.birt.chart.examples/src/org/eclipse/birt/chart/examples/view/ChartExamples.java
desGroup.setLayoutData( gridData );
		desGroup.setText( "Description" ); 
		description = new Label( desGroup, SWT.WRAP );
		description.setLayoutData( new GridData( GridData.FILL_VERTICAL
				| GridData.FILL_HORIZONTAL ) );
		description.setText( icp.getDefaultDescription( ) );
	}
	public void setFocus( )
	{
		mainComposite.setFocus( );
	}
	/**
	 * Disposes of all resources associated with a particular instance of the
	 * ChartExample.
	 */
	public void dispose( )
	{
		for ( int i = 0; i < tools.length; ++i )
		{
			Tools tool = tools[i];
			final Image image = tool.image;
			if ( image != null )
				image.dispose( );
			tool.image = null;
		}
	}
	/**
	 * Create the selection tree.
	 * 
	 * @param parent