There are no true synonyms — words with similar meanings always differ in connotation, register, or use.

The alphabet is a Greek innovation — the Greeks added vowels to the Phoenician consonant alphabet around 800 BC.

Body language accounts for 55% of communication, tone for 38%, and words for only 7% — according to Mehrabian's model (though this is often oversimplified).

Orca (killer whale) pods have distinct dialects — different groups use different calls that don't overlap.

The Hawaiian language has only 13 letters — 5 vowels and 8 consonants.

Linguistic relativity experiments show speakers of languages with more color words distinguish shades faster.

Noam Chomsky proposed humans have an innate 'universal grammar' — a built-in capacity for language.

The Japanese concept 'komorebi' means sunlight filtering through leaves — English has no equivalent word.

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