Use Wikidata for place names and Wikipedia descriptions

Now i am lost. I thought i had to add “Q100256456” to the photos to make them visible in any language. But know it seems there is a category
https://commons.wikimedia.org/wiki/Category:Westpark_(Groningen) Q100256456
without “Q100256456”
How does this work in multiplie languages, espacially Dutch and English (and German)

Can somebody tell me how this works ?
I did not know the parks itself where a seperate category (one week ago) ??

https://commons.wikimedia.org/wiki/Category:Eelderbaan Q100257347
https://commons.wikimedia.org/wiki/Category:Roege_Bos Q100257307

SLUG: https://forum.inaturalist.org/t/creating-inaturalist-places-and-linking-to-wikidata-using-geojson/
It might be an idea to use WikiMedia photos of places in stead of Flickr files as Flicker is less popular nowadays i think