It’s a personal choice, I’d say 5 (?) should be sufficient. Various institutions here (banks, DMV) ask to present an original at an appointment, after which they give it back to you. Even when I submitted documents for my adjustment of status to USCIS, I only submitted a photocopy. When I went to the interview with my husband, the IO asked for an original after which it was given back to me at the end of the interview. The only place I had to give away my original certified copy was when I had to renew my passport at the embassy of my country in the US and wanted to change my last name.
Have you considered Utah Zoom marriage? Many, many members here have used that option. That way you will have access to certified copies any time at a lower cost and you don’t ever have to be worried about translating it since it’s an official US marriage certificate.