We're planning to translate this article https://www.atlassian.com/git/tutorials/comparing-workflows to Spanish for use by our Spanish-speaking developers. When we're done, may we post the Spanish version to a page of our website (with credit to Atlassian) so that other Spanish-speaking developers can benefit from it?
Firstly, I must emphasise that I do not work for Atlassian, so it up to you if you want to act on this answer.
However, I notice that the page you linked appears to licensed under a Creative Commons Attribution 2.5 Australia License (there's a link in the footer of the page).
Under the terms of that license you are free to copy, redistribute and adapt as long as you meet the terms specified:
I would say that covers your proposed translation as long and you credit Atlassian and link to the license.
To double check, you could perhaps make a formal enquiry via Atlassian's general inquiries page.
G’day everyone! Super exciting news coming from the Marketplace. We have now fully rolled out the ability for end-users to submit app requests to admins directly from within the product! No longer ...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events