I'm using WPML in a multilingual site, and I also use wp-pagenavi. I would like pagenavi options to be shown in every different language on my site. for this I use WPML plugin but it looks like it's not working with your plugin.
WPML offers a free subscription for plugin developers who make plugins work with their plugin. Check it here.
Also wp-pagenavi users like me will be happier with your plugin! :)
Please, collaborate with WPML and make wp-pagenavi compatible.