The Muscogee language is spoken by native Americans who, emerged by ethnogenesis, and settled in Florida in what century? 
Muscogee language: The Muscogee language (Mvskoke in Muscogee), also known as Creek, Seminole, Maskókî or Muskogee, is a Muskogean language spoken by Muscogee (Creek) and Seminole people, primarily in the U.S. states of Oklahoma and Florida. Seminole:  The Seminole nation emerged in a process of ethnogenesis from various Native American groups who settled in Florida in the 18th century, most significantly northern Muscogee (Creeks) from what is now Georgia and Alabama.
the 18th century