Foreign language learners wonder when they'll be able to read and listen to that language and understand everything. But even native speakers don't comprehend everything they read or hear. What percent of words do we need to understand in order to comprehend a written or oral passage?
Learning more words is rarely the solution to comprehension troubles. How well do you know the 2,000 most frequently used words? Even if you have no interest in language learning, this post clearly demonstrates how challenging English can be—even when only using simple words.