Self-hosting Libre Franklin: which styles do I need?

Hi,

I want to self-host this theme’s default font, Libre Franklin. I use the google-webfonts-helper for that and everything works fine.

I’m just not sure which styles of the font I really need. I had a look at the theme’s stylesheet and came up with this: 300, 300i, 400, 400i, 600, 600i, 800, 800i. I guess everything works fine just because I have more styles than necessary and that probably I wouldn’t need italic styles for headings…

So I have two questions:
· Which styles of Libre Franklin do I need for Twenty Seventeen?
· What’s the easy way to find out which fonts and font styles a theme uses?

Thanks!