>>22907142Perhaps, but all regions we've seen so far speak the same language. A shirt and tie in Johto should still means a shirt and tie in Kalos. Pic related is a vest, so it should be called a vest and tie.
That being said, it is true that the American definition of shirt seems to encompass most upper-body garments (potentially including a vest), whereas our British term shirt refers more to the specific styles of button shirt like OP is wearing.
Considering the localization of the game is doneby Americans, the name "shirt and tie" for this is making a lot more sense.