Hello @Sahnoor Alam,
We recommend using the WPML plugin to fully translate your website into multiple languages. This will provide you with a language switcher feature, which you can use on your website and your site visitors can switch the language by selecting the language from the switcher.
For more information, please refer to our theme documentation on WPML here: https://xstore.helpscoutdocs.com/article/31-translation-with-wpml
Best Regards,
8Theme’s Team