Some messages ignored with per-player-locale active

[Fastbuilder575]

Type of bug

Other unexpected behaviour

/ess dump all output

https://essentialsx.net/dump.html?bytebin=XeaCiWTXWw

Error log (if applicable)

No response

Bug description

Essentials seems to ignore some of the messages defined in the custom language messages_XXXX.properties files and instead be using the default for some parts of the message.

Steps to reproduce

One example with the /fly command:

messages_de.properties file:
enabled=aktiviert
disabled=deaktiviert
flyMode=Du hast den Flugmodus bei {1} {0}.

Test 1:
Minecraft client language: English (US)
I execute the command /fly
Response from the server is: "Set fly mode enabled for [DEV] Fastbuilder575."

Test 2:
Minecraft client language: Deutsch (Deutschland)
I execute the command /fly
Response from the server is: "Set fly mode aktiviert for [DEV] Fastbuilder575."

Expected behaviour

Response from server should be "Du hast den Flugmodus bei [DEV] Fastbuilder575 aktiviert."

Actual behaviour

Response from server is "Set fly mode aktiviert for [DEV] Fastbuilder575." where some part of the file is used, in this case the translation for enabled, but the translation for flyMode is ignored.

Additional Information

No response

[JRoy]

do you have the custom locale file in plugins/Essentials/messages/messages_de.properties?

[Fastbuilder575]

Yes, content of the messages_de.properties file is currently the following:

enabled=aktiviert
disabled=deaktiviert
flyCommandDescription=Abheben, in die Höhe\!
flyCommandUsage=/<command> [spieler] [on|off]
flyCommandUsage1=/<command> [spieler]
flyCommandUsage1Description=Schaltet das Fliegen für sich selbst oder einen anderen Spieler ein, falls angegeben
flying=fliegt
flyMode=<primary>Du hast den Flugmodus bei <secondary>{1} {0}<primary>.