I have Sitecore 7.5 with Webforms for Marketers 2.5. I want to create a form in the French language. However I can't seem to select French as a language. When I open up the form designer there is a button and a dropdown to select a language other than English. However when I click on it nothing happens. I have a number of languages installed in this Sitecore instances. I have EN, de-DE, es-ES, fr-FR and zh-CN. I click on the button or the dropdown to select a language and literally nothing happens. No error message or anything. But also no way to select a different language for the form. Am I doing something wrong? Below is a screen shot of the button/dropdown in the form designer.
I don't have Sitecore 7.5 with WFFM module installed but this is listed as known bug in Sitecore knowledge base site.
It was fixed in WFFM 8.0 Update-2 as mentioned in the link above.
[Fixed in WFFM 8.0 Update-2] It is not possible to translate form in Form Designer. 'Language' dropdown doesn't show languages (24964).