Basic English English can be a hard language to learn. That’s why usually you learn it by levels. In CERF standard A1 is the beginner level, A2 is harder, but still is very easy. Then you have B1 and B2. Highest levels of learning are C1 and C2.
To make things easy for beginners, a special type of English language was made in 1930. The aim was to make it useful for learning and easy enough to explain complex ideas with simple words. This Basic English was made by Charles Kay Ogden, an English writer. Only 850 common words are used in Basic English. Any technical words can also be used, but must be explained with simple words first. New words are formed with common word endings and prefixes: un-, -s, -es, -er, -ed, -est, -ing, -ly. You can also make new words by combining some simple words into a new one. For example: milkman, fireman, sunrise, northeast, gearbox. In regular English such words are usually known as compound words.
Basic English has a sort of wordplay inside its name.