Why are all my photos' locations in Apple Photos in Saskatchewan Canada getting changed to Red River Valley Canada

I added your 623 12th St E, Saskatoon, SK Canada address to a photo in Mac Photos and the location text changed to Saskatoon, Red River Valley, Canada. However, the map thumbnail below it showed the correct location (See attached) and when I exported the photo (Use File > Export > Export 1 photo, NOT drag and drop) and checked its metadata, it showed GPS coordinates as 52 deg 7' 11.66" N, 106 deg 39' 16.45" W which are also correct. So there is a bug but the information is at least partially correct :)

We've seen this sort of thing before. It seems pretty crazy. Photos is using a lookup table to match GPS coordinates to place names, and it gets confused, apparently. I'm not sure where you should report it. And by the way, that address seems to come up correctly for me. It may be that you are getting some outdated lookup through your servers.

The address comes up correctly for me in Maps as well. How does the address work for you in Maps? Maps has a section (under the Maps menu) for reporting things, but I don't know if that's the best spot. You could also try using the Photos Feedback site:

Feedback - Photos - Apple

You might try waiting a day in case this is some transient glitch.

It is weird. I tried to report the problem with the location name using the MAPS app on my Mac.

But to report a problem with a place, I have to select its name from a list, but the location "623 12th St E, Saskatoon, SK Canada" is not shown in the list if names. SO I cannot report it. I would have to select some innocent victim to file the report.