Research in the field of high-proficiency in L2 speakers most commonly focuses on the age of acquisition and the corresponding critical period hypothesis. More current research tends to focus on...Show moreResearch in the field of high-proficiency in L2 speakers most commonly focuses on the age of acquisition and the corresponding critical period hypothesis. More current research tends to focus on the high-proficiency L2 speaker’s sentence structure or syntax, and their influence on comprehensibility. In this case study, a high-proficiency L2 speaker was phonetically analyzed to describe his L2 accent choices successfully and find possible deviations in his General American accent, according to listeners. 17 American born listeners were recruited to mark deviations based on an 8-minute long audio-clip containing high-proficiency L2 sentence fragments. This audio file was accompanied by a script (appendix 1), which allowed the listeners to highlight deviations, accentedness, or foreignness. The same materials were also presented to an expert listener who would be able to shed more light on the speaker’s possible deviations. Results suggested that the speaker indeed still exhibited some slight deviations according to the listeners. Elements of foreignness were found in in the /g, /l/, /t/, /ɾ/, /ɹ/, /æ/, /ɛ/, /ɪ/, and /ɑ/ sound, and the word ‘campfire’ was most commonly marked as deviating according to the listeners.Show less