The German word 'Weltschmerz' means the pain of comparing the world as it is with how it should be.

All human languages have nouns and verbs — but many lack adjectives or other categories found in English.

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

There is no word in English for the back of the knee.

The word 'dollar' derives from the Bohemian Joachimsthal, where silver coins called 'Joachimsthaler' (thalers) were minted.

The word 'muscle' comes from Latin 'musculus' meaning little mouse — the movement of muscles under skin resembled a mouse moving.

The word 'quarantine' comes from Italian 'quarantina' — meaning 40 days — the period ships were isolated during plague.

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

The @ symbol is called 'arroba' in Spanish and Portuguese, meaning a unit of weight.