Reply To: Multilingual Multisite

I’d recommend using a multilingual plugin like WPML or qTranslate instead.
If you want to use multisite you’ll need to export and import all relevant data from one database to another every time you change something. That includes the tables wp_posts, wp_postmeta and wp_options.

Please be aware that you need one premium license for each owner selling his stuff through easyreservations. As of that the plugin is not optimized for networks of any kind.