Second language acquisition 50 Language and languages 19 Study and teaching 19 English language 11 Second Language Acquisition 6 Study 5 Teaching 5 Foreign speakers 4 Language 4 Ability testing 2 African speakers 2 Education, Bilingual 2 Language teaching 2 Research 2 Second Language Education, Second Language Acquisition, Study and Teaching 2 Social aspects 2 Sociolinguistics 2 Study and teaching (Secondary) 2 Academic writing 1 Acquisition 1 Adoption 1 Bilingualism 1 Bilingualism, Second Language acquisition, Study and teaching languages 1 Bilingualism-Psychological aspects--Psycholinguistics--Second Language Acquisition 1 Case studies 1 Chinese speakers 1 Code switching (Linguistics) 1 Cognitive grammer 1 Cognitive theory 1 Communication in education 1