I have a client who is looking at building a new site using a CMS such as Joomla for their business. The problem though is that they have one office here in California and another in Tokyo. The employees at the Tokyo office should see the CMS backend in Japanese when they login while the employees in California shoule of course see it in English.

Can something like this be easily accomplished using the Japanese translation module for Joomla or should we be looking at another product.

I am hoping to find some info from folks who have takled a similar problem in the past.