Why the closest living relative to English is a language you likely cannot read

Cultures · Published 29 September 2026 Swipe more like this →

In short: Though English and Frisian share a common ancestor, centuries of geographic drift and external influence have rendered them mutually unintelligible. Today, these West Germanic languages are spoken by about 400,000 people across the North Sea coast, surviving as a fragmented group of dialects struggling against the dominance of Dutch and German.

The Frisian languages form the closest living group to the Anglic family, which includes English and Scots. Historically, Old Frisian and Old English were remarkably similar, sharing linguistic traits like the Anglo-Frisian nasal spirant law. However, while English evolved under the heavy influence of Norman French, Frisian spent at least five hundred years under the shadow of Dutch and Low German. This long-term contact has caused modern Frisian to bear a greater practical similarity to Dutch than to its English cousin, despite their shared genealogical roots.

Today, Frisian is divided into three main branches: West Frisian, North Frisian, and Saterland Frisian. West Frisian is the most widely spoken, with about 400,000 native speakers primarily in the Dutch province of Friesland. In contrast, Saterland Frisian is spoken by only about 2,000 people in Lower Saxony, and North Frisian is used by roughly 10,000 people in the Schleswig-Holstein region of Germany. These varieties are often so distinct that they are not mutually intelligible, leading some linguists to debate whether they constitute a single language or several separate ones.

The survival of these languages has been a precarious struggle. By 1500, Frisian had largely ceased to be a written language, following the 1498 occupation of Friesland by Albert III, Duke of Saxony, who replaced it with Dutch in government. While a 19th-century revival led by figures like Gysbert Japiks helped stabilize West Frisian, the language remains vulnerable. Today, only about 30% of the West Frisian population is competent in writing the language, and many dialects are considered seriously endangered due to a lack of institutional support and the overwhelming influence of standard Dutch and German in daily life.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?

Related

• Why English and West Frisian are long-lost linguistic siblings separated by the North Sea
• Are English and Frisian truly siblings, or just neighbors who shared a dialect?
• The linguistic fingerprints left by the ancient North Sea Germanic tribes
• Did a single ancestor language once unite the West Germanic world?
• The lost ancestor of English was a language of shifting sounds
• A film title change six hours before release saved this Indian action comedy
• Friesland: The Dutch province where ancient linguistic roots and fierce independence still thrive today.
• The ancient 'forest people' who shaped the Atlantic fringes
• The invisible architecture of the French accent
• The linguistic engine of innovation: why Gallo-Romance languages change so rapidly
• The surprising history of how a medieval dialect became a global powerhouse
• How a new nation built a police force without guns

More in Languages · More in Cultures · Latest · A–Z · All topics