The Vocabulary Builder on Kindle Paperwhite (and Oasis, Voyager) is a powerful feature for language learners if used right. It collects all the words that you look up, including their definition and context. You can then use a rudimentary flashcard system...

One thing about moving to or visiting a new country is that often the culture and customs are different. This means that when communicating with say, a person from Germany, responses and reactions may not be quite what you might...