Make sure that you have the multilingual version of GroupWise.
Both initial releases and Support Packs are provided in an English Only version (for faster download) and a multilingual version (that includes all available languages).
Install the client software in the languages you need in one or more software distribution directories, following the instructions in Software Directory Management.
Distribute the client software to users, as described in Distributing the GroupWise Client.
By installing the GroupWise client software in their language of choice, users can begin using GroupWise in that language immediately. However, there are a few language-related details of GroupWise functionality that are not taken care of by the client software running on users' workstations. For a fuller multilingual implementation, continue with Providing Post Office Support for Multiple Languages.