If you are wanting to make a site design that has multiple language options for your audience there are a couple of ways to go about it.
1). Google's default option
The first would be to design your site in whatever primary language you wish. Google has a built-in language detector and will suggest the page to be auto-translated for the user if the users' primary language is different than the language used on your site. This is the easiest option, though the translation may differ from the exact wording you are hoping for.
2). Create a duplicate of your site in another language
The second way would be to duplicate your site design and manually translate all of the text. While it's more work, this would allow you to have the exact translations that you want.
When you are finished you can put it up as a +Site so that it appears on a subdomain. You may want to name the site by the language that it is in for ease of swapping between the two!
Lastly, there are third-party tools out there that you can use to translate the site. One of them is called Yandex Translate. You can use this tool as an embed on your site.