Welcome to WPML support. I'd be happy to help you with this.
To make the language switcher visible, it is essential to ensure that all translations have been fully completed. Could you please verify if the page you are currently looking at has all translations at 100% completion?
If the issue continues to persist, kindly share the URL of the page where I can observe the problem.
Further, To help you further on this issue, I would need further information, so could you please go to WPML > Support > Debug Information and give me the information in the next reply. You can read the detailed instruction here: http://wpml.org/faq/provide-debug-information-faster-support/
To debug this issue further, I would need to check your site settings once, for this I would need temporary access (wp-admin and ftp) to your site.
So could you please provide me with those details, you will find the needed fields for this below the comment area when you log in to leave your next reply. hidden link
I can translate products and categories, but how can I translate the home page? A separate theme was created in hidden link. The default language (english) is different from the theme of the page.
Edit: I had previously made a separate installation for hidden link. That's why there was a different theme. My only question now is how can I translate the home page?