English language -- 46 Glossaries, vocabularies, etc 32 Vocabulary 27 Grammar 20 Study and teaching 20 Textbooks for foreign speakers 20 Vocabularies 20 more ... German language -- 17 Grammar -- 17 Dictionaries -- 10 English language 10 English 8 Problems, exercises, etc 8 Spanish language -- 8 Study and teaching (Intermediate) 8 Pronunciation 7 Vocabularies -- 7 Textbooks for foreign speakers -- 6 Pronounciation 5 Study and teaching -- 5 Chinese Language -- 4 Chinese language -- 4 Conservation and phrase books 4 French language -- 4 German language 4 Spanish language 4 vocabularies 4 Foreign speakers 3 Readers 3 Word frequency 3 less ...