Language and languages Study and teaching 90 Philosophy 27 Second language acquisition 22 Linguistics 20 English language 16 Variation 11 Sociolinguistics 10 Discourse analysis 8 Sex differences 8 Translating and interpreting 8 Filosofía 7 Ability testing 6 Language acquisition 6 Research 6 Social aspects 6 Computer-assisted instruction 5 Foreign speakers 5 Grammars 5 Language 5 Language and culture 5 Lengua e idiomas 5 Political aspects 5 Training of 5 Applied linguistics 4 Grammar, Comparative and general 4 Language teachers 4 Methodology 4 Multilingualism 4 Study and teaching (Secondary) 4