I don't see anything special on the (mostly English) signs the wiki article contains.

The destination:arrow tags in the wiki are only helpful if we know the orientation of the sign (unless you want to tag the sign only without relating it to any way close by)

What do you mean by "aren't oriented to cardinals directions"? They need to point in some direction to be useful, and the key we use is one of the eight cardinal directions that is closest to the direction the sign points to.