well, what about Dictionary class (System.Collections.Generic)? It would be like:
Dictonary<string, string> nameField = new Dictionary<string, string>(3);
nameField.Add("en", "Your Name");
nameField.Add("de", "Deine Name");
etc
Then you would have session variable called language (with values en, de or fr)
and you would call it as nameField[(string)this.Session["language"]]