Earlier quoted context omitted.
It used to have a page. It was deleted because the language was not considered significant. This is a relatively famous case, referred to frequently.
https://en.wikipedia.org/wiki/Wikipedia:Articles_for_deletio... > Lacks reliable independent secondary sources to establish notability as required by WP:GNG. Every source is WP:PRIMARY. Every one of them. Googling turned up posts to online discussion forums but nothing useful. Additionally, I note that the decision to delete at the previous AfD was unanimous for the same reasons. > Perhaps think of it this way: a lan…
That doesn't mean a language is not itself notable.
Anyway, there's plenty about Nim that is not primary:
http://goran.krampe.se/2014/10/13/here-comes-nim/
https://www.btbytes.com/notebooks/nimrod.html
http://picheta.me/articles/2013/10/about-nimrods-features.ht... (by Dominic Picheta but external to Nim website)
http://steved-imaginaryreal.blogspot.co.uk/2013/09/nimrod-re...
http://vocalbit.com/posts/exploring-type-classes-in-nimrod.h...
http://blog.ldlework.com/a-cursory-look-at-meta-programming-...
http://joshfilstrup.com/posts/2014-10-27-2014-monads-in-nim....
http://ziotom78.blogspot.de/2014/01/experiments-with-nimrod....
http://progopedia.com/language/nimrod/
https://geetduggal.wordpress.com/2014/03/03/consider-nimrod/
http://www.drdobbs.com/open-source/nimrod-a-new-systems-prog... (by Andreas Rumpf - but definitely an indicator of notability)
http://lambda-the-ultimate.org/node/4749
http://ivoras.net/blog/tree/2013/Oct-2013-10-05.what-i-like-...
http://www.infoq.com/presentations/nimrod (by Andreas Rumpf, but a sign of notability)
http://rosettacode.org/wiki/Category:Nimrod
http://gradha.github.io/articles/2014/11/swift-string-interp...
http://togototo.wordpress.com/2013/08/23/benchmarks-round-tw...
http://felsin9.de/nnis/nimrod/nimrod-gpn14.pdf
http://learnxinyminutes.com/docs/nim/
http://stackoverflow.com/questions/tagged/nim?sort=votes&pag...
http://gradha.github.io/articles/2014/03/nimrod-for-cross-pl...
https://impythonist.wordpress.com/tag/nimrod/
https://github.com/trending?l=nimrod
http://maniagnosis.crsr.net/2013/12/letterpress-cheating-in-...
That doesn't mean that the best resources aren't on the Nimrod website itself. But penalising a language for having excellent primary resources would be a bit crazy in my opinion.