SharePoint Online Question

I have SharePoint Online, If somebody can help to answer it. 

1. Can we make SharePoint Online as public facing website ?
2. SharePoint Online can supports multilingual website ? Can we make site variation ?
3. We have already on premise SharePoint 2013 intranet website and due to security reason we don't want to make that SharePoint  as Public website. We want to make same website on SharePoint Online. So now my question is that, can wesync on Premise SharePoint 2013 with SharePoint Online.

Hope I will get some expert reply on this.