Orthodox Arvanites, a group who traditionally speak a form of Tosk Albanian in addition to Greek and self-identify as Greeks, having played a significant role in the Greek War of Independence and Greek culture in general. The Chams were an ethnic Albanian community that formerly inhabited the area of Thesprotia, part of the Greek region of Epirus. Most of them were expelled into Albania through government-supported ethnic cleansing at the end of World War II after a large part of them collaborated with the Nazi occupation forces. There are other Albanian speaking communities found across other regions of Greece. In the Florina region Albanian speakers can be found in the villages of Flampouro, Drosopigi, Idroussa and Tripotamos. Furthermore, an estimated 39 mainly or partly Albanian-speaking villages can be found in Western Thrace and Central Macedonia. After 1991, with the collapse of communism in Albania, a huge number of Albanian immigrants live and work in Greece. In the 2001 census, 274,390 ethnic Albanians are reported residing in Greece, mostly economic migrants. Albanians constitute 63.7% of the total documented migrant population in Greece, followed by Bulgarians, Georgians, Romanians, Russians, and Ukrainians. Romance-speakers Aromanians In Greece, the Aromanians are called Vlachs (, /'Vlaçi/). There are numerous festivals celebrating Aromanian culture all over Greece. Their language, Aromanian (known in Greek as τα βλάχικα /'vlaçika/), is in danger of extinction and mostly spoken by the elderly. There are, however, small numbers of Aromanians in Greece who call for greater recognition of the Aromanian language, such as Sotiris Bletsas. It is hypothesized that these Vlachs originated from the Roman colonisation of the Balkans and are the descendants of Latinised native peoples and Roman legionaries who had settled in the Balkans. German researcher Thede Kahl claims to have also documented some cases of assimilation of the Aromanian population in regions which are now largely Greek-speaking. The Panhellenic Federation of Cultural Associations of Vlachs has publicly stated that they do not want Aromanian recognized as a minority language nor do they want it inserted into the education system, and the same organization also protested when Thede Kahl discussed in a paper whether they could be designated a "minority". Megleno-Romanians Megleno-Romanians are concentrated in the Moglena region of Greek Macedonia. They speak the Megleno-Romanian language which is known as Vlăhește by its speakers. An estimated 4,000 speakers can be found in the region spanning the Pella and Kilkis regional