See for example:
johannefoss.dk/cms/index.php/raderinger--etchings/etiopien-og-egypten--ethiopia-and-egypt/
The link-button for showing Image Caption is like this: [+].
I have a wish to alter the +-sign with a text, e.g. "English".
However, I cannot find where I possibly can edit the button.
Is the button an image or a text, and where can I edit it - if it is possible at all?