If I paste Hebrew into a card while creating it, the Hebrew doesn't look right. Maybe the font is incorrect? But when I view the card, it looks ok. So basically I don't have confidence when creating cards that they are correct. How to repro...
Go to Google Translate and translate the word "happy" from English to Hebrew. Then try to create a card with "happy" on one side and the Hebrew word on the other by clicking the "copy" button in Google Translate. Notice that the Hebrew doesn't render correctly. If you then view the card (not in edit mode), it looks ok.