Title: Languages of Belgium
Content:  Dutch is the most spoken primary language of Belgium and the official language of the Flemish Community and the Flemish Region (merged to Flanders). Along with French, it is an official language of the Brussels-Capital Region. The main Dutch dialects spoken in Belgium are Brabantian, West Flemish, East Flemish, and Limburgish. All these are spoken across the border in the Netherlands as well, and West Flemish is also spoken in French Flanders. Much like English, Flemish dialects have adopted more French and other Romance vocabulary through mutual cultural exchange throughout history when compared with other Dutch dialects. As such, they are not always readily intelligible for Dutch speakers outside Flanders. Nevertheless linguists regard these as varieties of Dutch. Words which are unique to Belgian Dutch are called belgicisms (as are words used primarily in Belgian French). The original Brabantian dialect of Brussels has been very much influenced by French. It is now spoken by a minority in the Capital region, since the primary language of most inhabitants shifted during the Frenchification of Brussels.
Title: Languages of Belgium
Content:  [[File:Belgiquefrancophonne.gif|thumb|Map of French-speaking Belgium. ]]The second-most spoken primary (Belgian) language, used natively by approximately one third of the population, is French. It is the official language of the French Community (which, like the Flemish Community, is a political entity), the dominant language in Wallonia (having also a small German-speaking Community), as well as the Brussels-Capital Region. Almost all of the inhabitants of the Capital region speak French as either their primary language (50%) or as a lingua franca (45%). Many Flemish people also speak French as a second language. Belgian French is in most respects identical to standard, Parisian French, but differs in some points of vocabulary, pronunciation, and semantics.
Title: Demographics of Belgium
Content:  Belgium's three official languages are Dutch, spoken by majority of the population, French, spoken by 45+ %, and German, spoken by less than 1%. The vast majority of Belgium's population, 99%, is literate as defined by the Belgian government, i.e. capable of reading and writing in an official language by the time a citizen has reached the age of 15. English is the official (meetings) language of the European Commission, 10% of the job market in Brussels; also, Arabic is 2nd most spoken language in Brussels according to fresh sources (around 10%)
Title: Dutch in Belgium
Content:  The Dutch language used in Belgium can also be referred to as Flemish Dutch or Belgian Dutch. Dutch is the mother tongue of about 60% of the population in Belgium, spoken by approximately 6.5 million out of a population of 11 million people. It is the only official language in Flanders, that is to say the provinces of Antwerp, Flemish Brabant, Limburg, and East Flanders and West Flanders. Alongside French, it is also an official language of Brussels. However, in the Brussels Capital Region and in the adjacent Flemish-Brabant municipalities, Dutch has been largely displaced by French as an everyday language. Belgian Dutch differs from Standard Dutch in terms of accent and vocabulary. The most spoken Dutch dialects in Belgium are West Flemish, East Flemish, Brabantian and Limburgish. Although the Brabant dialect has historically been associated with working-class areas of Brussels, in particular the Marolles, the virtual disappearance of those populations means that linguistic variants in which an influence of the Brabant can be discerned exist in a diminishing degree.
Title: List of multilingual countries and regions
Content: Belgium has three official languages: Dutch (59%) in the north, French (40%) in the south and a small minority speaks German (1%). Its bilingual capital, Brussels is mainly French-speaking, with Dutch speakers as a minority. These languages have the status of 'official language' only in specified language areas as defined by the constitution. In Flanders, 59% and 53% of the Flemings know French and English respectively; in Wallonia, only 19% and 17% know Dutch or English. In each region, Belgium's third official language, German, is notably less known than Dutch, French or English. Wallonia recognises all of its vernacular dialect groups as regional languages, 
Title: Belgian literature
Content:  Because modern Belgium is a multilingual country, Belgian literature is often treated as a branch of French literature or Dutch literature. Some writing also exists in the regional languages of Belgium, with published works in both the Walloon language, closely related to French, and also in various regional Flemish or Dutch-related dialects. German is the third official language in Belgium and is spoken by a small community of about 70,000 German-speakers of the German-speaking Community of Belgium in the border region Eupen-Malmedy. ''See :de:Belgische_Literatur.
Title: Belgian French
Content:   Belgian French (français de Belgique) is the variety of French spoken mainly among the French Community of Belgium, alongside related Oïl languages of the region such as Walloon, Picard, Champenois and Lorrain (Gaumais). The French language spoken in Belgium differs very little from that of France or Switzerland. It is characterized by the use of some terms that are considered archaic in France, as well as loanwords from languages such as Walloon, Picard and Dutch. French is one of the three official languages of Belgium alongside Dutch and German. It is spoken natively by around 45% of the population, primarily in the southern region of Wallonia and the Brussels-Capital Region.
Title: Languages of Belgium
Content:  The Kingdom of Belgium has three official languages: Dutch, French, and German. A number of non-official, minority languages and dialects are spoken as well.
Title: Belgium
Content:  Belgium has three official languages: Dutch, French and German. A number of non-official minority languages are spoken as well. As no census exists, there are no official statistical data regarding the distribution or usage of Belgium's three official languages or their dialects. However, various criteria, including the language(s) of parents, of education, or the second-language status of foreign born, may provide suggested figures. An estimated 60% of the Belgian population are native speakers of Dutch (often referred to as Flemish), and 40% of the population speaks French natively. French-speaking Belgians are often referred to as Walloons, although the French speakers in Brussels are not Walloons. The total number of native Dutch speakers is estimated to be about 6.23 million, concentrated in the northern Flanders region, while native French speakers number 3.32 million in Wallonia and 
Title: Languages of Belgium
Content:  Walloon is the historical language of southern Belgium, and most of the areas where French is now spoken were Walloon-speaking. It is also the traditional national language of the Walloons. Though it has been recognized since 1990, like other vernaculars in Belgium, it is spoken mainly by older people. Some younger Walloons may claim some knowledge. It is used mainly in rural regions, which have a slower rate of change. It is also used theatre productions and other forms of literature, though not in schools.

Question: what language is most commonly spoken in belgium?
Answer: French Language.