There's a German word 'schadenfreude' meaning pleasure derived from others' misfortune, with no English equivalent.

The Basque language has no known relatives anywhere in the world — it is a true language isolate.

Sign language grammar differs from spoken language grammar — word order and facial expression serve different grammatical roles.

The word 'OK' may be the most recognized word in the world — understood in virtually every language.

The symbol '#' has many names: hash, pound, number sign, octothorpe — 'octothorpe' was coined as a joke by a Bell Labs engineer.

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

Creole languages form when children of pidgin speakers create a fully structured native language.

Latin gave birth to French, Spanish, Italian, Portuguese, and Romanian — the Romance languages.

The word 'set' has 430 definitions in the Oxford English Dictionary — the most of any English word.