Yoghurt vs. yogurt
For the curdled-milk-based, custardlike food with a tart flavor, yoghurt is the preferred spelling in the main varieties of English from outside North America. Yogurt is preferred in American and Canadian English. They are variant spellings of the same word, and neither has any meanings all its own. A third spelling, yoghourt, is rare in this century. (Credit - Grammarist.com)
The English language has shortened the word to yogurt. It is a very competitive word to the modern spelling and could be used as such. Thus, low xxxx high xxx. Ty