Determining the current variation

If you need to find out which variation a client has requested, this code might do the trick.

Start by getting the current VariationLabel; then compare its title against a known variation title.

VariationLabel currentVariation = PublishingWeb.GetPublishingWeb
(SPContext.Current.Web).Label;

if (currentVariation != null &&
currentVariation.Title.ToLowerInvariant () ==
"au")
{
//do something
}