How to change the text "Create Issue" to "Create test" in all the places.
You can't, as you're using OnDemand.
If you had your own installation, see https://developer.atlassian.com/display/JIRADEV/Customizing+Text
You can use the JIRA Suite Utilities plugin to create a message custom field and write some Javascript to hack the text. Not quite feasible, but since you're on OnDemand. Last I looked they haven't blocked that yet.
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