Glossary entry (derived from question below)
Spanish term
Spain
Crianza
| 5 +2 | Crianza |
Sofia Bengoa
|
| 4 +1 | Aged for a minimum of two years, with one of those spent in oak casks. |
Lisa McCarthy
|
| 4 | A wine labeled crianza has spent one year in oak barrels. |
José J. Martínez
|
Non-PRO (1): Yvonne Gallagher
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Proposed translations
Spain
In other words, the same meaning.
Native in: Spanish (Variant: Standard-Spain) 
Works in: English to Spanish, Spanish to English, French to Spanish, and 1 more.
Crianza
Sometimes "crianza" also means ageing (EU Rule 2009).
Spain
Especialista de marketing
Native in: English
Works in: Spanish to English, Catalan to English
Aged for a minimum of two years, with one of those spent in oak casks.
Crianza The literal translation is ‘bringing up’, which makes sense given that these wines are one step on from ‘joven’ in Rioja terminology. Crianza wines must have been aged for a minimum of two years, with one of those spent in oak casks.
Read more at https://www.decanter.com/spanish-fine-wine/read-spanish-wine...
United States
ENSP, More than 30 years experience
Native in: English (Variant: US) 
, Spanish (Variant: Latin American)
Works in: English to Spanish, Spanish to English
Discussion
Even "reserva" doesn't really have a direct translation. Whilst it might be tempting to use "reserve", the latter is not protected in certain markets (e.g. the US, see below) and so doesn't carry the same meaning as in Spain where "reserva" meets a certain specification.
https://winefolly.com/tutorial/reserve-wine-well-depends/
https://www.winespectator.com/drvinny/show/id/5475
if it is a menu for wine-lovers, use "crianza", as it is reasonable to assume they know what this means. Changing it around might give people reading the menu the wrong impression. Similarly, if you called a cava a champagne, wine buffs would not be happy, and might think the place either didn't know much about the products they're offering, or were trying to pass off a cheaper product as something else.
On the other hand, if it is a menu for a general tourist type of place, perhaps you could use "oak-aged". Depending on the context, the amount of time may not be that important...I asked a few Spanish friends, and only my father in law (who worked for 30 years as a chemist in the wine and food oil sector) mentioned the amount of time it spent in the barrel. Everyone else more or less told me it was "better than roble, and cheaper than a reserva"...adding specifics about how long it spends in the barrel might be adding information which a Spanish reader is not getting from the source text.
In general, by Spanish law, these are the minimum ageing times, in months, for red wine in order to use the distinctions (whites and rosés are shorter):
Crianza = 24, 6 of these in oak barrels (rest in bottle)
Reserva= 36 months, 12 in oak barrels
Gran Reserva = 60, 18 in oak barrels.
However, some regions, like Rioja and Ribera del Duero have additional requisites. Both state 12 minimum months in oak barrels for Crianza, for example, and also specify what kind of barrels can be used.
Keep in mind that these times refer to when the bottle may be sold on the market. It’s great for the consumer, because you know that the wine is at a good or optimal point to drink when you purchase the bottle. It’s bad for the producers because they have to sit on a lot of stock before they can sell it. If you keep a crianza that’s been aged for at least 12 month in barrels for another year, it’s essentially equivalent to a reserva. So the distintion refers to when the bottle was put on the market.
As a linguistic question, I think you don't need to translate the term, and should use "Crianza" in English, but perhaps consider adding an explanation if needed. Essentially it means a wine that has been aged, but not for as long as a reserva or gran reserva. For a bit of context as to your thinking, how are you handling reserva and gran reserva here?
As a wine question, perhaps this link might help for some context, but I think it says much the same as the Kudoz entry; https://www.tripsavvy.com/spanish-wine-bottle-terms-1644785