Will remember that for future. But also can you answer my question for the Link above,
does it go in the External URL of the form and link to the confirmation page link? (see screen shots in earlier message)
No, you want to use the Form-Defined option, not the External URL option.
You're still controlling the Follow-up using the Form Editor UI.
In Form Editor, use Add Choice based on the Language Preference field to choose a different URL (i.e. differentiate by query string).
So in this part of the form UI
only the query string parameter in external URL? See image
This : http://go.tracelink.com/Language-Confirm.html?Language%20Preference=French
or this: ?Language%20Preference=Italian
The full URL, with query string (I don't think the UI will even let you do a relative URL).