This happens when the language is set to "한국어 (대한민국)"
Properly executes when the language is set to "English (US)".
When using
/scoreboard players enable <target> <trigger>
the output should be (as i expected)
<target>에게 <trigger> 트리거를 허가했습니다.
which is
Enabled trigger <trigger> for <target>
in english.
So the way to do this:
/scoreboard objectives add <trigger> trigger
Add a trigger.(Used <trigger> as the name.)
/scoreboard players enable <target> <trigger>
The output is
%2%s 에게 %1$s 트리거를 허가했습니다.
which is
Enabled trigger %1&s for %1%s
in english, whatever <target> and <trigger> is.
Edit 1: Added screenshot.
Command is
/scoreboard objectives add temp trigger
/scoreboard players enable <target> temp
Output is
%2%s 에게 %1$s 트리거를 허가했습니다.
which is same as above.
These translation issues are handled on crowdin: https://crowdin.com/translate/minecraft/9428/enus-ko