how to get list of installed cultures on computer?

Question

users usually install 2 or 3 cultures on their computers. we can reach current and all installed language with:

InputLanguage.CurrentInputLanguage;
InputLanguage.InstalledInputLanguages;

we can also reach current culture with:

CultureInfo currentCulture = Thread.CurrentThread.CurrentCulture;

but is there a way for found out which cultures they installed. or the only way is to change language that he\she installed and get cultures. I think there is a better an smarter way.