You may need to do some guessing with names or contact the society to see if they have a search function that allows you to search by language spoken. Good luck.
Hey there - I just did a little research online and saw this link for bilingual psychologists. They list arabic in the description, I hope you can find some there : https://www.psychology.org.au/Find-a-Psychologist/about/Bilingual-service
i believe there are a lot of arabic speaking psychs around, maybe once you start calling/asking someone will know someone they can recommend
