Multilanguage sites
Having a multilanguage website will always double the work that has to be done. With my project I have used RapidWeaver on the Mac. This is a desktop CMS application available only on the macOS. It is around for more than ten years now and it has a great community of developers and users. To create a multilanguage website I had use a stacks pages (type of page in RW) and I had to get the RWML addon stack. Depending on the requirements of the website you will have various options to get your job done. This starts with simple switchable text blocks on a page and it ends with individual projects files either on a subdomain or a subfolder within the domain.
With Mozello the multilanguage feature is built-in and the user didn't have to care about the technique behind. Of course you have to write the translated pages from scratch. But the switching itself just works. And this is what sitebuilders claim to be able to.