Zambia Urban dwellers sometimes differentiate between urban and rural dialects of the same language by prefixing the rural languages with 'deep'. Most will thus speak Bemba and Nyanja in the Copperbelt; Nyanja is dominantly spoken in Lusaka and Eastern Zambia. English is used in official communications and is the language of choice at home among – now common – intertribal families. This continuous evolution of languages has led to Zambian slang which can be heard in daily life throughout Lusaka and other major cities. Portuguese has been introduced into the school curriculum due to the presence of a large Portuguese-speaking Angolan
Official language the country had four official languages—Serbo-Croatian, Slovene, Albanian and Macedonian. Serbo-Croatian was used as a "lingua franca" for mutual understanding and was also the language of the military. When Croatia declared independence (1991) it defined its official language as Croatian, and Serbia likewise defined its official language as Serbian. Bosnia-Herzegovina defined three official languages: Bosnian, Croatian, and Serbian. From the linguistic point of view, the different names refer to national varieties of the same language, which is known under the appellation of Serbo-Croatian. It is said by some that the Bosnian government chose to define three languages to reinforce ethnic