Ultrasound recordings have been made of people speaking Gaelic to reveal how the tongue moves to produce the language's different sounds.
Gaelic has a large consonant system and some sounds - l, n and r - are each sounded three different ways.
The videos have been made available on a new website, Teangannan na Gàidhlig.
Researchers said the recordings could help people to learn Gaelic, and said they also shed new light on the "mechanics of bilingual speech".
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