Short description of Language Learning Express 1.3: Lex is an efficient language learning tool for working on authentic material on the web. With Lex you can easily look up words, listen to pronunciations, highlight words and make your own gap filling exercises. Lex uses various sites on the Web to look up words in both bilingual and monolingual dictionaries. As part of the look up process you can build up your own glossary, which later on can be used to make glossary exercises.