Some foreign characters are not rendered properly

[shankar2k]

I am using Anki to learn Slovak from books. The character 'ň' and 'ž' were not rendered correctly, though they work fine in Anki. Maybe the text should use a font with more unicode support?

[giacomoran]

Yeah, maybe it's sufficient to set a locale in satori https://github.com/vercel/satori?tab=readme-ov-file#locales