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Picard is known by several different names. Residents of Picardie call it picard; but in Nord-Pas-de-Calais its dialects are more commonly known as chti or chtimi, in and around the towns of Valenciennes and Lille as rouchi; or simply as patois by Northerners in general. Linguists group all of these under the name Picard. In general the variety spoken in Picardy is understood by speakers in Nord-Pas-de-Calais, and vice versa.
Belgium's French Community (La Communauté française de Belgique) gave full official recognition to Picard as a regional language along with Walloon, Gaumais (Lorraine), Champenois (Champagne) and German Frankish in its 1990 decree. The French government has not followed suit and recognised Picard as a regional language (this is in line with its policy of linguistic unity, which allows for only one official language in France), although some reports have recognized Picard as a language distinct from French.
The following is an extract from a report by Prof. Bernard Cerquiglini, the director of the National Institute of the French Language (l'Institut national de la langue française; a branch of the National Center of Scientific Research, CNRS) for the French Education, Research and Technology Minister and the French Culture and Communications Minister on the languages of France (April 1999)