How to get rid of ??????? in .pdf attachment

After submitting a form, client get e-mail with pdf attachment. All non-English symbols are replaced with qustion marks. (see attached example)
Can you advice something?

Or at least how to disable this option (to attach a pdf report to the confirmation letter)?

Hi

I think we will need add a new font for your language to solve this issue. Please submit a support ticket sending us super admin account of your site so that our developer can check and solve it

Tuan

Well, not now... I found that it useless for me...
I have 4 languages and so I need 4 invoices... now it's impossible in this version of PaymentForm...
Wait for new releases))