Wiktionary(0.00 / 0 votes)Rate this definition: 1  roster(Noun) A list of names, usually for an organization of some kind such as military officers and enlisted personnel enrolled in a particular unit; a muster roll; or a sports team, with the names of players who are eligible to be placed in the lineup for a particular game.
Dutch is the official language in Belgium. Dutch is the official language in Belgium. French-speakers often pejoratively call the Dutch language used by Flemings Flemish but it is Dutch nevertheless.
They speak Dutch. Whilst many say the language is Flemish, Dutch is the official language of the Flanders region. However there are regional dialects. This is common across Europe, you have a standard language but locally there are different dialects on the ground.