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

The first novel ever written in English is generally considered to be 'Robinson Crusoe' by Daniel Defoe, published in 1719.

There are languages with no word for specific colors — some languages group blue and green as one color.

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

The word 'goodbye' is a contraction of 'God be with ye.'

Sign languages are complete, independent languages — American Sign Language and British Sign Language are mutually unintelligible.

Babies can distinguish phonemes from any language at birth but lose this ability by 12 months.

The Tonal languages of Africa and Asia use pitch to distinguish meaning — Mandarin has 4 tones; Cantonese has 6–9.

The tongue does not have distinct zones for different tastes — the 'tongue map' is a mistranslation of a German study.