Btw, the text on the tram’s display says Driver training in Slovak :)

That is considered non-native here and it is very difficult to get rid of it.

The following links are in Slovak, but there are latin names of the plants.

• The list of invasive species in Slovakia: https://invaznedruhy.sopsr.sk/invazne-druhy-sr/invazne-druhy-rastlin-sr/
• Non-natives: https://invaznedruhy.sopsr.sk/nepovodne-invazne-sa-spravajuce-druhy-na-uzemi-sr/nepovodne-invazne-sa-spravajuce-druhy-rastlin/
• And EU list: https://invaznedruhy.sopsr.sk/invazne-druhy-eu/invazne-nepovodne-druhy-rastlin-vzbudzujuce-obavy-unie/

I have found a seed mix that appears to not have any invasive plants (site in German): https://www.bloomling.de/samen-maier/bio-nuetzlingsweide-summ-summ-wiese, and it is also available in my country.