It's often said that English is one of the hardest languages to learn. Given the fact that many of the words we use in English stem from Latin and Ancient Greek words - in common with many other European languages - what is it about English that has attracted this reputation for being so fearsomely difficult?

Learn how to remove filler words from formal speeches to present with confidence.

Here are seven random numbers. Sort of like a telephone number, but arranged vertically. Take a glance - just a glance - then pause, take out a piece of paper and see how many you can recall. Done? According to the French neurologist and mathematician Stanislas Dehaene, about 50 percent of English speakers can remember all seven numbers.

An estimated 7,000 languages are being spoken around the world. But that number is expected to shrink rapidly in the coming decades. What is lost when a language dies? In 1992 a prominent US linguist stunned the academic world by predicting that by the year 2100, 90% of the world's languages would have ceased to exist.