Apologies if this nerd-snipes you, but supporting the caron might also be fairly simple given you could just vertically flip the circumflex https://en.wikipedia

Apologies if this nerd-snipes you, but supporting the caron might also be fairly simple given you could just vertically flip the circumflex https://en.wikipedia.org/wiki/Caron https://en.wikipedia.org/wiki/Caron Together with the macron, pinyin (the main romanization for Chinese) would be mostly supported. https://en.wikipedia.org/wiki/Pinyin https://en.wikipedia.org/wiki/Pinyin