I noticed this discussion. But why not just create a https://crowdin.com (or other similar free for opensource project localization service) localization project? And then volunteers can contribute language packs very conviniently! And what's more, change the reousrce.dll method, instead usinghttps://docs.microsoft.com/en-us/aspnet/core/fundamentals/portable-object-localization?view=aspnetcore-3.1 method.
I'm not familar with PKI. I wonder if there is a certificate which supports PDF signature & Apache wildcard server. I mean, from which CA to request such a certificate to authorize my SignServer, then all certificates issued by my SignServer will be trusted globally.