Action Text: insert existing blob instead of uploading new file?

By default the Action Text editor offers a button to upload new files but not to select previously-uploaded blobs. Has anyone got an example of how to browse and attach an existing blob?

Background info: Our web app is bilingual, meaning that we publish two versions of each post with different rich text content. However the images inside these posts are 99% of the time not locale-specific. Therefore after having published the post in one language, I would like to reuse the same images in the other post version.

OK, instead I’ve just copied the entire rich-text from one language to the other. This way the rich-text embedded attachments are copied and the text inside can then just be replaced as needed.

It would also be great though to have a way to pick from the existing blobs using some kind of content gallery.