That's fair. I was born twenty years after Modula-2 was released, so I definitely have gaps in my language knowledge :D

Plenty of material over here, https://www.modula2.org/index.php

As for the other ones I listed,

https://en.wikipedia.org/wiki/Mesa_(programming_language) (some PDFs linked from there)

https://bitsavers.org/pdf/borland/turbo_pascal

https://www.freepascal.org

https://docwiki.embarcadero.com/RADStudio/Sydney/en/Delphi_D...

and

https://learn.adacore.com/index.html

http://www.ada-auth.org/arm.html

Thanks!