Ключевые слова: abstract, alphabet, app, book, business, chinese, collection, communication, concept, education, elearning, english, flat, foreign, french, german, global, globe, icon, illustration, information, international, italian, knowledge, language, learn, learning, lesson, letter, literature, online, reading, russian, school, sign, spanish, speak, speech, study, studying, symbol, teach, teaching, text, translation, travel, understand, university, word,