Perception of English /r/ and /l/ by Japanese speakers
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Japanese has one liquid consonant, a flap that varies between lateral [ɺ] and central [ɾ]. English has two: an alveolar lateral approximant /l/ and rhotic consonant of varying phonetic properties centered on [ɹ]. Japanese speakers who learn English as a second language later than childhood often have difficulty in hearing and producing /l/ and /r/ accurately.
In other words "LOAL"