capitalized() on all-Mtavruli Georgian writes a capital first letter: ᲜᲘᲜᲝ ᲑᲣᲠᲯᲐᲜᲐᲫᲔ gives Ნინო Ბურჯანაძე #1223

Georgian writes no initial capitals. Mtavruli (U+1C90–U+1CBF) is used only for whole words in capitals, and Unicode gives Mkhedruli letters no titlecase mapping to Mtavruli for that reason. Case repair of a name written in Mtavruli should give plain Mkhedruli, but it keeps a Mtavruli first letter on each word.

Measured on master 93de2cb:

initials() gives Ნ. Ბ. for the Mtavruli spelling and ნ. ბ. for the Mkhedruli one.

The cause looks like Python's str.capitalize() in nameparser/_render.py's word repair: it titlecases the first character, and a Mtavruli letter's titlecase is itself. Lowering the word before titlecasing its first letter gives the right answer, since a Mkhedruli letter's titlecase is itself. Rule: rules/R4 (case repair reads the unjoined mark).

No all-Mtavruli name list was found; Wikidata shows 4 of 5,242 Georgian labels written with a Mtavruli first letter.