it actually is not necessary at all because SE implemented a pretty great auto-translate feature!
...which is totally incomplete and missing key phrases and words that won't be added even up to 6 years down the line.
Can you translate "gil" yet, or do you still have to use "money?"
"Reward:" was nice, after all the issues with "Reward" but there really are many phrases that don't exist in auto-translate that you don't miss until you need them. I do, however, love the auto-translate feature in FFXI/V, and think that it, for the most part, is great.