I just upgraded to Windows 10 from a German Windows 7 installation. I switched my display language to English (United States) and my region to English (United Kingdom). Now whenever I search for some settings like for example "UAC", the search results will still be in German.
I already tried removing German completely in the language settings, switched between German and English as my display language several times and also rebuilt the search index. Any solutions before I have to reinstall the OS entirely are appreciated.