Hi,

It is the default feature of the Odoo, for this what you have to do is that load the necessary languages to the database from the Settings and it's translation.

Once you make the necessary languages active, you can go go users menu and set the languages for them from under the preference tab in users form view.

Either admin users can set and give language for the other users, or the user itself can switch their language by clicking the preference button.

See this Odoo documentation: https://www.odoo.com/documentation/user/11.0/general/odoo_basics/choose_language.html

Thanks