Currently the Barcode report item supports only symbologies which can encode characters in the regular ASCII code range. The characters you have mentioned fall outside that range, so at the present moment there is no way to encode them. This is not some kind of limitation to our Barcode item though. Simply put, there are too many barcode standards and symbologies meant for various purposes, and it should be an enormous task to support them all, so we decided to add support only for a small subset, which in our opinion are the most commonly used. However we are always open for suggestions and we might consider implementing more barcode symbologies in the future, if there is enough customer demand.