Flemish

Flemish ("Vlaams") is a Low Franconian dialect cluster of the Dutch language. It is sometimes referred to as Flemish Dutch (), Belgian Dutch ( ), or Southern Dutch (). Flemish is native to Flanders, a historical region in northern Belgium; it is spoken by Flemings, the dominant ethnic group of the region. Outside of Flanders, it is also spoken to some extent in French Flanders and the Dutch Zeelandic Flanders.
Terminology.
The term "Flemish" itself has become ambiguous. Nowadays, it is used in at least five ways, depending on the context. These include:
MultiTree considers Flemish to include the four principal Dutch dialects in the Flemish region (Flanders): Brabantian, East Flemish, West Flemish and Limburgish as well as three other dialects. Glottolog considers Western Flemish to be a separate language, classified as a part of the Southwestern Dutch family together with the Zeelandic language. According to Glottolog, Western Flemish includes the dialects of French Flemish and West Flemish. Brabantian and East Flemish are classified as Dutch dialects, under the Central Southern Dutch dialect group. Ethnologue considers Limburgish and West Flemish to be separate (regional) languages.
Characteristics.
Dutch is the majority language in northern Belgium, being used in written language by three-fifths of the population of Belgium. It is one of the three national languages of Belgium, together with French and German, and is the only official language of the Flemish Region.
The various Dutch dialects spoken in Belgium contain a number of lexical and a good amount of grammatical features that distinguish them from the standard Dutch. Basic Dutch words can have a completely different meaning in Flemish or imply different context. As in the Netherlands, the pronunciation of Standard Dutch is affected by the native dialect of the speaker.
All Dutch dialect groups spoken in Belgium are spoken in adjacent areas of the Netherlands as well. East Flemish forms a continuum with both Brabantic and West Flemish. Standard Dutch is primarily based on the Hollandic dialect  (spoken in the Western provinces of the Netherlands) and to a lesser extent on Brabantian, which is the dominant dialect in Flanders, as well as in the south of the Netherlands.
Tussentaal.
The supra-regional, semi-standardized colloquial form (mesolect) of Dutch spoken in Belgium uses the vocabulary and the sound inventory of the Brabantic dialects. It is often called an "in-between-language" or "intermediate language," intermediate between dialects and standard Dutch. Despite its name, Brabantian is the dominant contributor to the Flemish Dutch "tussentaal". 
It is a rather informal variety of speech, which occupies an intermediate position between vernacular dialects and the standard language. It incorporates phonetic, lexical and grammatical elements not part of the standard language but drawn from local dialects.
It is a relatively new phenomenon that has been gaining popularity during the past decades. Some linguists note that it seems to be undergoing a process of (limited) standardisation or that it is evolving into a koiné variety.
"Tussentaal" is slowly gaining popularity in Flanders because it is used a lot in television dramas and comedies. Often, middle-class characters in a television series will be speaking "tussentaal", lower-class characters use the dialect of the location where the show is set (such as Western Flanders), and upper-class characters will speak Flemish. That has given "tussentaal" the status of normalcy in Flanders. It is slowly being accepted by the general population, but it has met with objections from writers and academics who argue that it dilutes the usage of Standard Dutch. "Tussentaal" is used in entertainment television but rarely in informative programmes (like the news), which normally use Flemish accents with standard Dutch vocabulary.
Belgicisms.
A belgicism is a word or expression that occurs only in the Belgian variant of Dutch. Some are rarely used, others are used daily and are considered part of the Belgian-Dutch standard language. Many belgicisms are loanwords and words or expressions literally translated from French (also called gallicisms); others, in response, are actually remarkably purist, such as "droogzwierder" (a compound of Dutch "droog" "dry" and "zwierder" "spinner") meaning "centrifuge" (common standard Dutch: "centrifuge", a loanword from French), and "duimspijker" (a compound of Dutch "duim" "thumb" and "spijker" "nail") meaning "thumbtack" (common standard Dutch: "punaise", a loanword from French). Among the belgicisms, there are also many words that are considered obsolete, formal, or purist in standard Dutch. Moreover, many belgicisms have their origin in the Belgian official nomenclature. For example, "misdaad" "felony" is not a legal term in the Netherlands, but it is in Belgium.
Etymology.
The English adjective "Flemish" (first attested as , ; compare , ), meaning "from Flanders", was probably borrowed from Old Frisian. The Old Dutch form is , which becomes , in Middle Dutch and in Modern Dutch.
The word itself is derived from , an Ingaevones word, from the Germanic (a cognate to the English "flow" and the Old German word ), which means 'flow or current'. The name was formed from a stem , with a suffix "-ðr-" attached.