How to Load GWT theme Dynamically

I have an application built on GWT with internationaliation. I want to load the GWT theme dynamically.For example:If (`localhost:8080/GWTApps/app.html`) then load this `<inherits name='com.google.gwt.user.theme.clean.Clean'/>` theme or else (`localhost:8080/GWTApps/app.html&local=ar`) load this `<inherits name='com.google.gwt.user.theme.clean.CleanRTL'/>`.How to achieve this dynamically any idea or thoughts on this?

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