The fictional Central Asian nation in Street Fighter 6's World Tour mode is Nayshall.
Nayshall is one of the principal locations explored by the player's customizable avatar in World Tour, the game's single-player action-adventure mode. The setting is presented as a small Central Asian nation with its own communities, political tensions, criminal activity, and connections to the wider Street Fighter cast.
It is separate from Metro City, another major World Tour location familiar from the Final Fight series. Metro City supplies the urban training-ground portion of the campaign, while Nayshall broadens the story into an international setting and gives several characters, including Dhalsim and other masters, a role in the avatar's journey.
The name can be confused with fictional countries from comics and films, such as Latveria, Val Verde, or Genosha, but those belong to other fictional universes. Nayshall was created specifically for Street Fighter 6 and is part of the game's new narrative geography rather than a real country.