Hello @Leonhard Blank , Thanks for using Microsoft Q&A Platform.
In the documentation the supported languages for pre-built invoice are listed here: Invoice data extraction – Form Recognizer - Azure Applied AI Services | Microsoft Learn
I believe the prebuilt invoice model in Form Recognizer detects a wide range of currency symbols not limited to these supported regions/countries. I have tested few scenarios like Japan and other currency symbols it was detected successfully.
Please let us know if you have any issues or looking for any specific currency symbol that causes issues, we are happy to help you on this.
I hope this helps.
Regards,
Vasavi
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