Create a new subsite in a different language
By default, sites and site collections appear in the language in which the product was set up. If you’re a site collection administrator, you can choose the languages you want to make available for a site’s user interface. If alternative languages are set up by the site collection administrator, then you can create subsites in languages other than the default language. For example, if your default language is English, you can still create subsites in Japanese and Hindi.
First, make sure you’re at the location on your site where you want to create the new subsite. Also make sure you have permission that’s at least equivalent to being in the Designers group on that site.
Click Settings > Site contents.
On the Site Contents page, click new subsite.
Type a Title and URL name for the site, and select a template.
In the Template Selection section, choose the language that you want to create the site in, using the drop-down menu. You can also change the permissions and navigation settings for the site on this page.
When the initial settings look good, click Create.
SharePoint creates your new subsite with the user interface in the default language that you selected.
If you want to publish the same site in different languages, see Create a multi-language website. For a general understanding of the Multiple Language User Interface (MUI) feature and multi-language websites, see Introduction to multilingual features.