Emails and Thankyou

I have a german and a translated englisch form. How can I manage that an englisch thankyou-page/mail will come if a user fills out a form in english? 

Here is how to change the Thank You page depending on the language: https://www.jotform.com/help/333-How-to-Change-Thank-You-Message-Depending-on-the-Language-Used 

Let us know if you need more help, we will be glad to assist you.