Hi Carolina, as you can see in this documentation Service Desk is available for other languages:
Altough, I'm not sure if it can be changed if you have the OD version.
Hello Carolina, languages currently available to AOD products are shown here: https://confluence.atlassian.com/display/AOD/Language+Support+in+Atlassian+OnDemand
I'd presume based on this list, that even changing your JIRA setting may not suffice to include JSD at this time, but it may be worth a try if you have a lower environment, or you could check with your Atlassian support.
Hello Atlassian Community! I'm Teresa, the Product Marketing Manager for Jira Service Desk Server at Atlassian. I'm excited to announce two exciting releases for Jira Service De...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs