Endonym for Nahuatl language

Hey Amir!

Marrovi, a Nahuatl Wikipedia editor I met at Wikimania, has asked me for advice on changing the endonym used for Nahuatl in MediaWiki/Wikimedia. (He says that the native name should be "Nahuatlahtolli" rather than just "Nahuatl"). I've asked him whether there was a community discussion, but haven't heard back yet.

How would the change be made? I read the FAQ on language names and looked at the CLDR website, but couldn't find anything for Nahuatl (nah) although I did see some references to specific dialects(?) of Nahuatl like Eastern Huasteca Nahuatl (nhe). Would we have to add a locale for nah?

Neil P. Quinn (talk)‎

Yeah, I met him, too - he's great!

Mainly, we'll need to change Names.php in core and langb.yaml in the ULS extension, and possibly some CLDR files, but I wonder about two things:

Where exactly do they want the change to appear? Interlanguage links list? Are they sure that that's what they want?
What exactly is the explanation for the change and what's the, um, reliable source for it?

Amir E. Aharoni (talk)‎