Translating "Send" not working in admin area

Hello,

I am having trouble trying to translate the submit “Send” button.

I have seen the post:
https://www.ads-software.com/support/topic/plugin-contact-form-7-translate-the-clear-and-send-buttons?replies=5
but it didn’t help.

I have managed to translate everything else simply in the admin area but the “Send” is resisting. Here’s a screenshot of my admin area.

https://www.terrain-neuf.fr/wp-content/uploads/2012/11/Screen-Shot-2012-11-29-at-10.27.09-AM.png

I have also looked in the code of every file from the plugin but couldn’t find anything.

What am I doing wrong?

Thanks a lot for your time.

Guillaume

https://www.ads-software.com/extend/plugins/contact-form-7/