Indulge in body butter? Look after your lips with a velvety lip balm? The chances are that your cosmetics contain an ingredient whose name betrays the origin of one of the oils used in them: shea butter or beurre de karité.

They are made from oil of nuts of the same plant, Vitellaria paradoxa. In English, it is called the shea trea, but guess where this designation hails from? I was reminded of its origins when watching Na baro kè’s brilliant video chat on the cold season, in which inhabitants of the city of Bobo Dioulasso in Burkina Faso mentioned that they use body lotion, si tulu (literally shea oil, often pronounced with a sh sound, phonetic [ʃ]) in the Bambara language.

So how did shea oil or butter, si tulu, into beurre de karité? Whichever French-speaking person introduced this word to the French language took inspiration from Wolof, a language spoken in Senegal. In Wolof, the shea trea is called kaarite.

So whenever you use shea butter or beurre de karité, you’re connecting with a West African language linking the word to the area where the product is grown and harvested.