It depends. When you're saying 사랑 the 'ㄹ' have the sound of 'R', for example. But in 일요일 the first 'ㄹ' have the sound of 'R' and in the second have a sound closer to 'L'. And in 랄랄라, all the 'ㄹ' have the sound of 'L'. These are the pronunciations: http://pt.forvo.com/word/%EC%82%AC%EB%9E%91/#ko ~사랑 http://pt.forvo.com/word/%EC%9D%BC%EC%9A%94%EC%9D%BC/ ~일요일 http://pt.forvo.com/word/%EB%9E%84%EB%9E%84%EB%9D%BC/#ko ~랄랄라 The 'ㄹ' change his sound because of 받침. If you need more information about it there's this site: http://www.koreanwikiproject.com/wiki/index.php?title=%EB%B0%9B%EC%B9%A8 Oh and sorry for my English. (: