How to implement additional locale?

I understood how to add the Japanese locale to Exchange.  However, our environment has two NLB Front-ends and 4 Active/Passive Cluster Nodes Back-Ends.  Do I need to add the locale to the front-ends (OWA) and the back-ends?  How about the Supplemental language support?  Does that need to be installed on all Exchange boxes?  

Thank you!
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abhaighConnect With a Mentor Commented:
I would hazard a guess that - yes, it does

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