Naxi pinyin is the romanisation used by the standard Naxi dictionaries (Pinson/Webonary and others). It looks like Mandarin pinyin but does not behave like it: q, v, ee and iu encode Naxi vowels and tones, dd and bb mark phonation rather than doubled sounds, and tone is carried in the IPA numerals rather than in diacritics. The practical rule: read the IPA beside every headword, not the letters.
“Pinyin” in Chinese context means the Mandarin romanisation, and readers reasonably assume the same letter values. In Naxi pinyin they differ, and the difference is not cosmetic: a word read with Mandarin values is a different word. The dictionaries that define the standard — Pinson's Naxi dictionary on Webonary, He & Jiang's 1985 sketch — each fix a specific set of conventions, and earlier sources (Rock's 1930s romanisation, Sinological transcriptions in Chinese publications) spell the same words differently again.
IPA, because it means the same thing everywhere. Every entry in this dictionary carries both the source romanisation and an IPA transcription, with tone numerals: kuel lieq “good luck” is [kʰwə⁵⁵lʝə¹¹].
The gazetteer is where this bites hardest, because the same place is attested under a Naxi pinyin form, an IPA form, Rock's romanisation, and one or more historical Chinese names. Each place record keeps those in separate fields rather than collapsing them — see for example 仁里村 (aiqko).
NaxiAI. “Naxi pinyin — and why it is not Mandarin pinyin.”
https://naxiai.com/naxi-pinyin.