After Set and configure variations for your site collection , then you need to configure variation labels by adding a label for each language you want your site to have.
After successfully doing that, you may need to make the visitor of your site able to select between those different languages. for example having a list of available languages on your site's master page.
Shareponit 2007 has an out-of-the-box usercontrol that can automatically shows the available languages to your site's visitors, see the below image.
By Defualt your site's master page will have that control , but you have to do additional step to have it visible to your site's visitors by
1) Going to the path where the VariationsLabelMenu.ascx resides.
C:\Program Files\Common Files\Microsoft Shared\web server extensions\12\TEMPLATE\CONTROLTEMPLATES
supposedly you installed MOSS 2007 on your C: drive.
2) Open the VariationsLabelMenu.ascx using VS.
3)You will find that cms:VariationsLabelEcbMenu is outcommented with comments. Remove these comments and the control will works fine :)
Mohammed Barakat Kharboush