Bassa is a tonal language belonging to the linguistic family. There are three reginal dialets which differ from each other slightly in culture. The principal characteristic the people use is differentiating the groups are linguistic.
The three groups include the Mabahn (principally spoken in Margibi County), the Gi Gban or Gibi (spoken throughout most of Grand Bassa County and Bong County) and the Nebue Kli (spoken in Rivercess County). During the 1920's an alphabetic script known as the "Vah" evolved into a type of writing called "Vaa Ceedeh" or signal writing which script was perfected and taught by Bassa physician, Dr. Thomas Narvin Flo Lewis who earned a doctorate degree from Syracuse University in 1910. Dr. Lewis had a typesetting machine manufactured in Dresden, Germany between 1915 and 1920 to produce Bassa primers, first and second grade textbooks for "Vah" schools in Buchanan. He died early September, 1935. Below is the widely used script: