External Support
The following plugins are supported to resolve language-keys by, meaning that the entries they add to the server's central Registry will also show up when building predicates; the display-names they provide are sanitized, meaning that all color-values - be it legacy, hex or even MiniMessage XML-format - are stripped off, in order to ensure a seamless experience.
If a key could not be resolved neither internally nor externally, a warning will be logged on startup; use these messages to report back, so that further support can be added. There's no limitation to how many plugins may be supported, as integration requires only a few lines of code.
EcoEnchants
https://github.com/Auxilor/EcoEnchants