To display the value of a field (e.g. [Contest.Name] or [Event.Name]) in the correct language in Output Lists, e-mails/sms, Certificates etc. use the Text() function.
Text([Field];"language code")
The corresponding field will be displayed in the selected language, e.g. Text([Contest.Name];"en") returns the English Contest name, whereas Text([Contest.Name];"de") returns the German Contest name.