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For a Windows system for example you change the Default Hebrew Font to "Arial" and then click "Save" on the top right of the page.
The server administrator must specify the desired font for each language/locale that will be generating PDFs.
This change does not require a server restart.
Now the Hebrew characters will show correctly in your pdf reports.
Souce!!!:https://jazz.net/forum/questions/171005/how-can-i-fix-gibberish-output-in-csv-and-pdf-export-from-rqm-while-using-hebrew-language-characters