I had some difficulties using wildcard URL with a multi-language site
In the Community Site, for example, the /Members/Profile "document url path" is defined as

/Members/{UserName}

If you create a version of the page in another language, the url may well become broken. Here is a solution : for a french page for example, use the "document url path"

/Members/{UserName}/fr-fr

I hope this will be usefull to others...
XB