Lambdacism (from the Greek letter λ) is the inability to pronounce or difficulty in pronouncing l sounds.[1] In general, /r/ is usually substituted for /l/, as in Japanese.

A common form of lambdacism is lallation. The substitution of /l/ for /ɹ/ in pronunciation, it is a common feature of Japanese and Korean pronunciation of English. Substitution of /l/ for /n/ at the beginning of a word or syllable (or the reverse at the end) is also a feature in certain East Asian languages, such as the Northern dialect of Vietnamese as well as Cantonese and Thai.

See also


  1. Stinchfield, Sara M (1933). "Speech Disorders: A PSYCHOLOGICAL STUDY of the Various Defects of Speech". Routledge. Retrieved 10 June 2019. lamdacism for difficulty with l sounds

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