You can have multiple sitemaps per site. This is an excellent example of when this makes sense.
Make sure you have a sitemap index listing each of your sitemaps. It will probably look like this:
http://website.net/sitemap_fr.xml 2004-10-01 http://website.net/sitemap_de.xml 2005-01-01 http://website.net/sitemap_es.xml 2005-01-01
Remember to link this index in your robots.txt file, for example:
There is also the option to specify alternative pages in your sitemap itself. The setup is a bit more complicated and inherently does not answer the original question about the user-suggested settings.