I just wanted to bump this conversation back up, since it seems to be a very important one for our international customer base. (I'm US-based, but 90% of my customers are not.).
I'm considering just adding an extra setting for the watch face, but that takes up code/memory space, and it's not something the customers can apply once across all their watch faces.
Has anyone come up with a better solution for this?
I'm considering submitting an official feature request into the bug report area, but I wanted to check here first.