Henry Sweet (15 September 1845 – 30 April 1912) was an English philologist, phonetician and grammarian.As a philologist, he specialized in the Germanic languages, particularly Old English and Old Norse. In addition, Sweet published works on larger issues of phonetics and grammar in language and the teaching of languages. Many of his ideas have remained influential, and a number of his works continue to be in print, being used as course texts at colleges and universities.