We are currently developing a website which uses the Māori language (from New Zealand): https://en.wikipedia.org/wiki/M%C4%81ori_language
For correct pronunciation the written form of Māori uses macrons - horizontal lines over vowels to signify a long vowel.
Our issue is that most web fonts seem to revert macron characters to some sort of default, which looks terrible. Here's how the (assumed) defaulting behaviour appears in a Māori saying:
I'm hoping there's a list somewhere of web fonts that correctly support Māori macrons, but I have been unable to find it via Google.
Does a list exist, or is there an easy way of working out what web fonts will work with Māori macrons?