Missing language entry - To submit you need to be subscribed

This is parameter in content type. You can enter key there and add language override.

http://docs.mintjoomla.com/en/cobalt/translation-and-multilinguage

Also note there are translation projects there

Cobalt 7

Emerald 8

Thanks for link to translation project and solution how to use key label.

But I still don't know which file or field should I edit.

I'm very depend on this. When can I expect an answer?

"To submit you need to be subscribed user and have following subscriptions"

This is not language value it is parameter either in the field or in type.

Ok, Thanks.

This is exactly what I need. :)