The Se in Sesotho does not mean language It is a noun class marker which is an inalienable part of the morphology of the word That s simply the way the word looks For example education is derived from educate through a change in morphology The change implies that the word is a noun but it is not valid to simply use the root without the suffix sotho is a root which is made meaningful with class markers Sesotho Basotho Lesotho etc The Se marker in this case does indicate language but the class has many other types of nouns seponesa the police force sefofu blind person sefate tree seanamarena traditional blanket sekgathe verbal tense etc So yes it is a tad complicated TheWHO