We are talking about 1492 here, there was already a established Spanish language
That same year this was written:
https://en.wikipedia.org/wiki/Gram%C3%A1tica_de_la_lengua_ca...
72 karma · joined October 15, 2012
That same year this was written:
https://en.wikipedia.org/wiki/Gram%C3%A1tica_de_la_lengua_ca...
That's certainly in production but I don't know if counts as a "productive purpose".