Configuration
You have to put on your JIRA_HOME folder a file with this pattern: i18n-engine-LANGUAGE-CODE.json.
File is read only when changes have been detected.
List of ISO-639-1 codes: https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
File content
Sample for a Spanish file:
{
"Computer support":"Soporte a equipamiento informático",
"If you have problems with your laptop, let us know here","Si tiene problemas con su computadora portátil, infórmenos aquí"
}