Linear A is a Minoan script used in Crete during the Bronze Age. Despite extensive efforts, its meaning remains a mystery.

The Phaistos Disc is a clay disc covered in a unique script that has not yet been deciphered.

Burushaski is a language spoken in northern Pakistan that has no known genetic relatives.

The Voynich Manuscript is a mysterious codex written in an unknown script and language.

Hittite was the language of the Hittite Empire, a powerful civilization in ancient Anatolia.

The Indus Script is an ancient script used in the Indus Valley Civilization, one of the earliest civilizations in the world.

Basque is a language isolate spoken in the Basque Country, a region in northern Spain and southwestern France.

The Rongorongo Script is an undeciphered script found on wooden tablets on Easter Island.

Etruscan was the language of the Etruscans, an ancient civilization in central Italy.

The Codex Seraphinianus is a book written in an unknown script and language, created by Italian artist Luigi Serafini.

Georgian is a language isolate spoken in the Caucasus Mountains, with its own unique alphabet.

The Ba Gua Script is an ancient Chinese script found on oracle bones, used for divination.

Akkadian was the language of the Akkadian Empire, a powerful civilization in ancient Mesopotamia.

The Tartaria Tablets are a collection of metal plates covered in an unknown script, found in Romania.

Great Andamanese is a language isolate spoken by the indigenous people of the Andaman Islands.