When I was at Microsoft, one test pass used pseudolocale (ps-PS IIRC) to catch all different weird things so this should have Just Worked (TM), but I was in Windows Server team so client SKUs may have been tested differently. Unfortunately I don't remember how Program Files were called in that locale and my Google-fu is failing me now.
As I recall pseudoloc is just randomly picking individual characters to substitute that look like the Latin letters to keep it readable for testing, so it would be something like рг (Cyrillic) ο (Greek)... etc, and can change from run to run. It would also artificially pad or shorten terms to catch cases where the (usually German) term would be much longer or a (usually CJK) term would be much shorter and screw up alignment or breaks.
I seem to remember that it was mostly adding various accent marks / umlauts / etc. to English words so things were indeed readable but I'm not going to bet any money on that as I didn't have to actually log in onto those machines super frequently.
