well if you mean decent then you are saying something is neither extraordinary or bland and if your saying descend then that means to move down or lower something or yourself.
English descent.
a descent of a male or father
darwin This was in his work 'The Descent of Man.'
Jared is a Hebrew name meaning "descent."
An American female of Mexican descent and culture.
A person of Irish descent
One who is of both Dutch and Irish descent.
Creole is a person of mixed European and black descent, especially in the Caribbean. Many people in the coastal regions of Louisiana are of Creole descent.
Is someone with Portuguese and Mexican descent, or with both nationalities.
An Albanian, of Albanian descent. http://www.answers.com/topic/albanese-2
The last name Dyess means of descent from the dye.
there are lots of French accents, just as English ones. The fact your way of speaking matches one of them doesn't mean you are of French descent, and the fact you speak without any hint of French accent doesn't mean that you are not of French descent.