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Can you get away with the image if you add an audio link for the ISI?  Another option might be an iframe.

What Highland said, but also ... If you add a langage element, make it a crawlable parameter. You want to be able to tell the search engines that those parameters mean language. This is possible in webmaster tools. Also worth noting is that if a site is translated, it does not mean it is internationally targeted. Not everyone that speaks spanish lives in Spain. Just keep that in mind. Starting with translation is best, but do not think that translating means that you are targeting different countries. More work needs to be done there. Many sites do fine having one site (.com) and translating into the most popular langages. Due to their global nature, their site ranks fine without country targeting. It's up to your market to determine what is best and if country targeting is necessary.

The more links a sitemap the it harder it is for people to follow but should be ok for search spiders.