If you have a website with multiple languages, you should not use the same URL for different language versions of your pages. Google’s John Mueller said that a URL is an identifier of content. There should be one piece of content per URL. If you have an English page and a German page, both should have their own URLs.
A URL is an identifier of content. One piece of content per URL.— 🍌 John 🍌 (@JohnMu) November 25, 2019
Check all URLs of your website
The website audit tool in SEOprofiler checks all URLs on your website and it checks the content that can be found on these URLs: