something that makes an agreeable sound (see Molina and Karttunen); also seen to mean the Nahuatl language, although Nahuatlahtolli more commonly referred to the language
a speaker of Nahuatl who worked as an interpreter between those speaking Nahuatl and those speaking Spanish or another indigenous language; typically a native speaker of Nahuatl but could also have been someone else who learned Nahuatl well; sometimes also called a translator
a name found in 16th-c. Mexico City (as Nauatlatouatzin yn Iuitzin; which we might regularize as Nahuatlatoatzin in Ihuitzin); if this name was originally given in pre-contact times, it might translate as an agreeable speaker; but if it is a post-contact title, then he may have been the local interpreter