About a new word is added to the English language every two hours, roughly 4,000 new words per year.

The word 'clue' originally referred to a ball of thread — in Greek mythology, Ariadne gave Theseus a thread to escape the labyrinth.

Esperanto has around 2 million speakers and was invented in 1887 by Ludwig Lazarus Zamenhof.

The fear of the number 13 is called triskaidekaphobia — many hotels skip the 13th floor.

The word 'set' has the most definitions in the English language — over 430 in some dictionaries.

The word 'serendipity' was coined by Horace Walpole in 1754 based on a Persian fairy tale.

The hashtag symbol '#' is officially called an octothorpe.

The dot over the lowercase letter 'i' is called a tittle.

English has the most borrowed words of any language — absorbing vocabulary from over 350 languages.