Issue
I worked around the way to change the locale of the plugin. But there is a couple of components that need to be refreshed (if they are visible) such as custom Views (org.eclipse.ui.views) or Menu, in order to avoid restart Eclipse. Please I need your help.
Solution
The platform doesn't have a way to switch locales while running. The IExtensionRegistry picked a locale while loading the extensions for the views, and the only general way to update them is to restart.
The org.eclipse.core.runtime.IExtensionRegistry had new multi-language support added (maybe in 3.7.0?) but the framework doesn't use it at this time.
EDIT: restart
To restart your eclipse with a new locale you need to change the command line (update the -nl flag), save it in the system property eclipse.exitdata, and exit your IApplication with org.eclipse.equinox.app.IApplication.EXIT_RELAUNCH. See org.eclipse.ui.internal.ide.actions.OpenWorkspaceAction for an example of how this is used.
Answered By - Paul Webster