Plano Plurianual

19:38 May 28, 2016 

'Pluriannual' is not in my electronic version of Merriam-Webster's unabridged dictionary. Most US English wordsmiths use this dictionary as their ultimate authority. (My version is a few years old, so it could be outdated).
Even more important, terminology theory (based on ISO recommendations) insists that, when given a choice and when there is no compelling reason otherwise, we should always pick the most commonly used term to prevent the perpetuation of competing terms. Competing terms are undesirable for many reasons: they complicate communication and waste people's time trying to figure out which form better (as in this case).

19:06 May 28, 2016 

Yes, Muriel, you are right, but I've already read Pluriannual for that, a very weird translation I assume.

02:03 May 27, 2016 

National *programs* can get translated in various ways, but none of the versions are "official" in other languages. That said, Ministries may have official titles in the official languages of organizations such as the World Health Organization and the International Labour Organization.

In this case, it's hard to imagine any possible variant on 'multi-year program'.