At all cases you will need the WPML plugin to handle the multi-lingual website.
1- You will need to purchase the plugin through here: https://wpml.org/?aid=121884&affiliate_key=j6wV2Gz6xKAk
2- Install it to Circle Flip
3- Follow this guide to setup your languages and content : http://docs.creiden.com/circleflip/circle-flip-with-wpml/
If you needed any further assistance, please let me know immediately.