Jazz Jackrabbit 2 language files tool
This tool can export Jazz Jackrabbit 2 language files (J2S) into human-readable and editable text file. After editing, it is possible to assemble file back.
Exporting J2S file:
java -jar jazz2langtool.jar export english.j2s english.txt
Importing text file back to J2S file:
java -jar jazz2langtool.jar import modified.txt english.j2s
You need Java 8 or later installed.
Jazz 2 J2S File specification, Jazz 2 J2S Character encoding