I needed to make a multilingual website for a client, and I first tried with the multisite option. Then I discovered DW and WPML, and restored the single site on wordpress to try them: but they don't work, and just show both languages contents on the same page.
I tried to use them on another basic installation of WP - replicating the same dual language logic - and there they work correctly. So now I believe that although I removed the multisite option (following the many tutorials about this operation, including removal of database entries, edit wp-config and .htaccess...), there' still something in the code that was left from multisite, and is preventing the two plugins to work correctly.
Thanks in advance for your precious help, and please tell me if you need to know more about the specific website.