I am trying to add a language (en-US) to a TermBase that has en-GB and de-DE so for. I would like to duplicate the exact content of en-GB under the en-US entries.
How can I best do this?

I am trying to add a language (en-US) to a TermBase that has en-GB and de-DE so for. I would like to duplicate the exact content of en-GB under the en-US entries.
How can I best do this?