Only JIRA administrators can create/modify a language in OTJ.
In order to create/modify a language in OTJ, follow the below steps:
1. Login to JIRA using an Administrator account
2. Search for the “Settings” symbol in the top right corner
3. In the “JIRA Administrator” section click on “Add-ons”
4. Navigate to "Outlook To JIRA" section located in the left panel of the page.
5. Click on "Language Configuration"
Click the below links for more information on how to: