They're going to have to work on the i18n. It defaulted to English but the entire page except like 3 words are in some other language.
I run a Forgejo instance too for my own use, but haven’t looked into how translation is set up as I haven’t had any need for changing any of the templates or texts that ship with Forgejo by default.
You know, they could just use their own language. The link to forgejo even states: "code.overheid.nl (Dutch)"
This, I fear, is just a materially wrong statement.