I noticed this problem too, after upgrading to 0.9.1.
Tried the latest development version (0.9.13), but the problem persists:
When clicking the add media button (Upload/Insert) inside "Edit Post/Page" no images are shown. If I go to the "Media" section, edit a image and just click "Update Media", the default language gets set. Then if I go to "Edit Post" and click the add media button, that image is the only one that appears (if the language of the media matches the language of the post).
I understand where you are going, making the media "language aware". But there should be an option in the "add media modal window", allowing to show all media/images, regardless of the language they are set.
Otherwise, people with existing sites, will have no way of adding media to their posts.
Also, there could be a feature/button in the plugin settings page which when clicked would set the language for all media according to this:
- if the media is attached to a particular post, set it to the same language
- if the media is unattached, set it to the default language
But the option for showing all media regardless of language should also exist, because we may want to use the same image for posts in different languages.
Right now I have no time, but I may try to look at it, next week.