From this work, linguists have been able to develop lists of sounds that native speakers of particular languages may find problematic in learning English. For example, speakers
of Asian languages may have difficulty producing /l/and /r/ sounds; speakers of Spanish may have difficulty distinguishing between and producing /sh/ and /ch/ sounds. These lists for specific language backgrounds are now featured in pronunciation texts, such as Sounds
Right (Braithwaite, 2008), and pronunciation software programs, such as American Speech Sounds