You can tell directly from the news article whether this article can be translated. This is indicated by the small Germany flag in the right corner of the post.
Note: Not every post is automatically set this way. The background here is that the real-time translations are provided externally by third-party providers and are subject to their data protection regulations. You can see this when you activate the translation function.
To have the article translated, click on the circle with the German flag. The following menu then opens:
Here you can click on the "SPRACHE / LANGUAGE" button and select the appropriate language from the drop-down menu.
As soon as you have made your selection, the post will be translated in real time.