I understood Windows named some of the most important directories with spaces, then special characters in the name so that 3rd party applications would be absolutely sure to support them.
"Program Files" and "Program Files (x86)" aren't there just because Microsoft has an inability to pick snappy names.
Should have called it Progrämmchen, to also include umlauts Ü
TIL it was deliberate!
Fun fact: that's not true for all Windows localizations. For example, it's called "Programmi" (one word) in Italian.
Renaming system folders depending on the user's language also seems like a smart way to force developers to use dynamic references such as %ProgramFiles% instead of hard-coded paths (but some random programs will spuriously install things in "C:\Program Files" anyway).