Old High German, Latin and French accent (9)
I believe the answer is:
landgrave
'old high german' is the definition.
(type of historical German aristocrat)
'latin and french accent' is the wordplay.
'latin' becomes 'l'.
'french accent' becomes 'grave' (type of accent mark in French).
'l'+'and'+'grave'='LANDGRAVE'
(Other definitions for landgrave that I've seen before include "high-ranking German" , "Sovereign prince" , "Nobleman speaking German" , "European noble" , "Count c" .)