and language autodetect

Hi,

i have added a css file via StyleLibary and "SharePoint:CssRegistration" into my MasterPage. My SharePoint supports englisch as default and german GUI.

<SharePoint:CssRegistration name="<% $SPUrl:~SiteCollection/Style Library/en-us/custom.css %>" runat="server"/>

My Question is: Can Sharepoint autodetect the users GUI and auto bind the right css file into the masterPage?

for the englisch user "~SiteCollection/Style Library/en-us/custom.css" and
for the german user "~SiteCollection/Style Library/de-de/custom.css"  ??