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Foreign Accent Syndrome

  • Cynthia M. Johnson, MA
Publication Type:


Foreign Accent Syndrome



Foreign accent syndrome (FAS) is a rare speech disorder. A person with it sounds as if they are speaking with an accent from another country.

Stroke—Common Cause of Foreign Accent Syndrome.

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FAS is caused by damage to the part of the brain that controls the rhythm and melody of speech. The damage may be due to:

Risk Factors

Things that may raise the risk of FAS are:

  • Being at a high risk for stroke
  • Aphasia—problems understanding and expressing language
  • Speech apraxia—problems making sounds, syllables, and words


Problems may last months, years, or may never go away. People with FAS speak in a distorted rhythm and tone, such as:

  • Making vowel sounds that are longer and lower, such as changing English “yeah” to German “jah”
  • Changing sound quality by moving the tongue or jaw differently while speaking
  • Substituting words or using the wrong words to describe something
  • Putting sentences together the wrong way

A person with FAS may be able to speak easily and have others understand them. The accent may also be within the same language, such as American-English to British-English.


The doctor will ask about symptoms and health history. A physical exam will be done. It will focus on the muscles used to speak. A mental health exam may also be done to rule out other causes.

Language skills will be tested. This can be done with:

  • Reading, writing, and language comprehension tests
  • Recordings to look at speech patterns

Images will be taken of the brain. This can be done with:

The brain's electrical activity may be measured. This can be done with an electroencephalogram (EEG).

FAS is rare. A team of specialists may be needed to make the diagnosis.


The goal of treatment is to manage symptoms. Choices are:

  • Speech therapy to learn how to better move the lips and jaw during speech
  • Counseling to help cope with FAS


There are no known guidelines to prevent FAS. Stroke is the most common cause. People who are at risk for stroke should talk to their doctor about taking steps to lower their risk.





  • About FAS. Foreign Accent Syndrome (FAS) Support website. Available at: http://www.utdallas.edu/research/FAS/about.
  • Foreign accent syndrome. American Speech-Language-Hearing Association website. Available at: http://leader.pubs.asha.org/article.aspx?articleid=2278208.


  • Rimas Lukas, MD
Last Updated:

This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.