Please answer the following question: What language is spoken by 4.2% of the population in the country where the highest ranked institution is Sofia University?  Answer the above question based on the context below:  Public expenditures for education are far below the European Union average as well. Educational standards were once high, but have declined significantly since the early 2000s. Bulgarian students were among the highest-scoring in the world in terms of reading in 2001, performing better than their Canadian and German counterparts; by 2006, scores in reading, math and science had dropped. Although average literacy stands at 98.4% with no significant difference between sexes, functional illiteracy is significant. The PISA study of 2015 found 41.5% of pupils in the 9th grade to be functionally illiterate in reading, maths and science. The Ministry of Education and Science partially funds public schools, colleges and universities, sets criteria for textbooks and oversees the publishing process. Education in primary and secondary public schools is free and compulsory. The process spans through 12 grades, where grades one through eight are primary and nine through twelve are secondary level. Higher education consists of a 4-year bachelor degree and a 1-year master's degree. Bulgaria's highest-ranked higher education institution is Sofia University.Bulgarian is the only language with official status and native for 85% of the population. It belongs to the Slavic group of languages, but it has a number of grammatical peculiarities, shared with its closest relative Macedonian, that set it apart from other Slavic languages: these include a complex verbal morphology (which also codes for distinctions in evidentiality), the absence of noun cases and infinitives, and the use of a suffixed definite article. Other major languages are Turkish and Romani, which according to the 2011 census were spoken natively by 9.1% and 4.2% respectively. The country scores high in gender equality, ranking 18th in the 2018 Global Gender Gap Report. Although women's suffrage was enabled relatively late, in 1937, women today have equal political rights, high workforce participation and legally mandated equal pay. Bulgaria has the highest ratio...
A:
Romani