Blame Microsoft for creating this problem. If you have a Windows license from one country and use it elsewhere where the nationally recognized languages are not

Blame Microsoft for creating this problem. If you have a Windows license from one country and use it elsewhere where the nationally recognized languages are not the same, chances are you cannot set Windows to use your preferred language. In Windows XP, Microsoft locked each license down to a subset of allowed languages based on the country the license was sold in. You can download a "Language Pack" for any language, but these only provide a half-assed superficial layer of support. A "Language Pack" only translates some aspects of the OS, falling short of being the equivalent to choosing that language as a native OS setting with the appropriate license. A quick Google shows that "Language Packs" are still a thing in Windows 7, Vista, and 10. Perhaps they now offer complete support, or perhaps they are still a crippled aftermarket solution refusing to meet the expectations of any paying customer. tldr; Many people in non-English countries are using Windows' licenses bought from English markets (such as the US). Even if these users know where to change the OS's language setting, odds are their native language isn't listed as an option.