Hi Takayuki,
Yes, thank you very much for your hard work!
I too would like to know how to make WPML and CF7 work together.
I looked at http://contactform7.com/contact-form-in-your-language/ and it seems this approach defeats the purpose of having WPML manage a multilingual sites, since, as far as I understand, you say we have to create different contact forms for each language... That is a lot of extra work when WPML could take care of it if only CF7 worked with it...
It says on WPML's support (http://wpml.org/documentation/support/translation-for-texts-by-other-plugins-and-themes/how-to-use-contact-form-7-in-multilingual-websites/ ) that you removed the functionality that supported this functionality. Why??
Please let me know if there's anything that can be done to solve this problem.
Thanks