The first thing you need to determine if it's just the dial that's rotated, or the whole movement in the case. I have come across watches where someone was sloppy when tightening down the clamps to hold the movement in place, and the movement had been shifted slightly. I received the watches when the stems failed from bending due to the misalignment.....so that needs to be checked first.
If the dial is misaligned, it can be fixed in most cases.
I just straightened two dials on watches brought to me by a client. One on an ETA 6497 clone, and the other on a pilot watch with a Miyota movement. The dial feet have been bent out of their proper position, which is why the dial seems rotated. It's also possible that they could have broken off, but that's not as common as them being bent out of position. I guess it's also possible that, depending on the watch, the dial could be held on with dial dots, but I usually only see this on very cheap watches thankfully.
The dial feet can be bent back straight, and this will align your dial for you in most cases. Depending on the watch and how much it's bent and how delicate the dial is, I take the hands and dial off, and straighten the dial feet with a pair of #8 tweezers (also good for straightening bent pivots), and then mount the dial and hands again. In some cases, you can actually straighten the dial as it sits on the movement by turning it - care must be used or you could shear the dial feet off, so this is not something I would recommend you do if you have no experience with this sort of thing. This is easier if there is a sub-dial hole to judge how far out the dial is, and when you have turned it back straight.
So here is an example - this first photo shows the dial as I received it. I added some lines to help you see how misaligned it actually was - note that I might have the camera at a bit of an angle, so this may make it look different than in real life in these photos. The point where the lug intersects the case is my reference, and using this and looking at the 5, 7, 11, and 1 o-clock markers you can see the dial is rotated counter-clockwise:
Here is the watch after I straightened the dial, and you can see the points line up much better now:
Hope this helps.
Cheers, Al