Is there anything similar in other languages? I would love to have a similar resource for my German learning.
The websites of government agencies usually have a version in leichter Sprache, although it tends to be counterproductively hidden.
The NDR offers news using leichte Sprache: https://www.ndr.de/fernsehen/service/leichte_sprache/
Edit: or any of the other sites on this list: https://bpb.de/politik/grundfragen/politik-einfach-fuer-alle...
Further edit: there's a Wikipedia category for simplified languages, which in addition to English and German also has Latin and French: https://en.wikipedia.org/wiki/Category:Simplified_languages