Cleveland, Salt Lake City, Atlanta, Nashville, Orlando, Tampa, Raleigh and Baltimore-Washington, D.C. due to 20th- and 21st-century immigration. Rest of the Americas Although Spanish has no official recognition in the former British colony of Belize (known until 1973 as British Honduras) where English is the sole official language, according to the 2010 census it was then spoken natively by 45% of the population and 56.6% of the total population were able to speak the language. Due to their proximity to Spanish-speaking countries and small existing native Spanish speaking minority, Trinidad and Tobago has implemented Spanish language teaching into its education system. The Trinidad government launched the Spanish as a First Foreign Language (SAFFL) initiative in March 2005. In addition to sharing most of its borders with Spanish-speaking countries, the creation of Mercosur in the early 1990s induced a favorable situation for the promotion of Spanish language teaching in Brazil. In 2005, the National Congress of Brazil approved a bill, signed into law by the President, making it mandatory for schools to offer Spanish as an alternative foreign language course in both public and private secondary schools in Brazil. In September 2016 this law was revoked by Michel Temer after impeachment of Dilma Rousseff. In many border towns and villages along Paraguay and Uruguay, a mixed language known as Portuñol is spoken. Africa Sub-Saharan Africa Equatorial Guinea is the only Spanish-speaking country located entirely in Africa, with the language introduced during the Spanish colonial period. Enshrined in the constitution as an official language (alongside French and Portuguese), Spanish features prominently in the Equatoguinean education system and is the primary language used in government and business. Whereas it is not the mother tongue of virtually any of its speakers, the vast majority of the population is proficient in Spanish. The Instituto Cervantes estimates that 87.7% of the population is fluent in Spanish. This figure highlights Equatorial Guinea as having a higher proportion of proficient speakers of a colonial language relative to the respective metropolitan languages in other West and Central African nations. Spanish is spoken by very small communities in Angola due to Cuban influence from the Cold War and in South Sudan among South Sudanese natives that relocated to Cuba during the Sudanese wars and returned for their country's independence. North Africa and Macaronesia Spanish is also spoken in the integral territories of Spain in Africa, namely the cities of Ceuta