Features/Visual-dictionary

to do is the user interface : JS language will be needed. the rest is rather simple.

the tooltip content can be translated in any language. this can easily be done using the collaborative tool on the site.

I would say, it is an excellent idea, indeed ;)

for the interface, a image tagging script (as in facebook) can be used, like this example: https://techlister.com/php/simple-photo-tagging-with-php-and-jquery/1176/

Oh, yeah! The selection tool! They are already there!

I guess the images all need metadata about the license. It’s easy to take down an image in wiki and replace with another if the copyright holder send the letter, but the visual dictionary is not the case.

I would not bother about the copyright, but would just add a link to the image author.