Variation English language 30 Dissertations 11 Dissertations, Academic 11 Spoken English 11 Study and teaching 10 Arabic language 8 Language and languages 7 Usage 7 Dialects 5 Human genetics 5 Genetics 4 Language 4 Second language acquisition 4 Social aspects 4 Syntax 4 Attitudes 3 Lexicography 3 Lexicology 3 Linguistic change 3 Plants 3 Pronunciation by foreign speakers 3 Study and teaching Foreign speakers 3 Written English 3 Bats 2 Case studies 2 Chinese language 2 Chinese students 2 Chromosome polymorphism 2 Foreign speakers 2