aceituna, no menos de una

11:38 Nov 21, 2018 

Unfortunately, we have no basic context regarding the target audience or register, etc, upon which to base an informed suggestion, so anything we offer can be no more than a stab in the dark. More information from the poster would - as always - be helpful if he/she hopes for anything at all meaningful from us...Perhaps the reason behind so many questions "closed without grading"!

09:11 Nov 21, 2018 

I like ""An olive a day keeps the doctor away" as it's jokey, and easily recognisable as a wordplay based on the folklore saying about apples. And they keep telling us how great olive oil and a Mediterranean diet are the bees' knees.

16:23 Nov 20, 2018 

like rhyming "Olive" with "Bolly" (squirm, squirm!)

16:14 Nov 20, 2018 

unfortunately, with its stress on the first syllable ("O"), the word "olive" does not lend itself to rhyming, or at least not a lot that would sound natural. The best you could hope for is a half-rhyme such as "bodies"...
Or you could go for something completely different, such as adapting an old adage, e.g.: "An olive a day keeps the doctor away"

16:07 Nov 20, 2018 

If you are translating the whole book, then of course you need to translate the title as well. But this is usually best done at the end, when you've completed the main text and have a good idea of what the author is getting at with his/her title.
Otherwise, if this title is simply the name of a book being cited in the text, then Phil is right, and of course the title should not be translated.
But you've provided no explanation/context, making it hard to for us to provide any meaningful suggestions!

10:38 Nov 20, 2018 

A literal translation makes no sense. The internal rhyme of the Spanish will also be difficult to maintain IMHO. I suppose you could always opt for the approach taken by translators of movie titles for Spanish cinemagoers. For example "Water", which they translated as "Loca Juerga Tropical"... :)

06:57 Nov 20, 2018 

What is the context?
Why do you need to translate it?
Should it not remain in Spanish?
If you do need an English version, for example if it's the title of a book you've translated, you need to ignore the untranslatable Spanish and come up with something clever of your own. Have you had any thoughts about this?