While working with MOSS varaitions you may noticed that you will not find any mechnasim for switchin youg language i.e Language selection will be missing on you page. This is bacuse the language selection is disabled by default.
For enabling language selection you need uncomment a line in VariationsLabelMenu.ascx mnually. It can be located at "[Program Files]\Common Files\Microsoft Shared\web server extensions\12\TEMPLATE\CONTROLTEMPLATES\" folder.
you have to uncomment line for language selection in "VariationsLabelMenu.ascx" to enable language selection on your MOSS site