Is it possible to change "Create issue" to say something else like "Create Task" in Jira?
Nope, the menu isn't customizable on Cloud, and certainly not on the free versions.
I believe it might be theoretically possible on the server versions, but definitely not on Cloud. That's all handled by Atlassian.
https://community.atlassian.com/t5/Jira-Software-questions/Is-it-possible-to-change-the-label-quot-Issues-quot-for-a/qaq-p/1831731
Here's another answer that indicates you cannot on Cloud, but can on server.
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