In romanian language for numbers greater than 19 we add preposition “de”.
The plural noun do not change but there is a rule that says:
after numbers greater than 19 must be added the preposition “de”:
ONE------------------FEW-------------------OTHER
1 zi-----------------19 zile--------------------20 de zile (1 milion de zile)
1 oră----------------2-19 ore----------------20 de ore (1000 de ore)
1 săptămână----------2-19 săptămâni–20 de săptămâni
1 an-----------------2-19 ani-----------------20 de ani (66 de ani)
1 dolar--------------2-19 dolari-------------20 de dolari
1 euro---------- 2-19 euro---------------20 de euro
Also, the preposition “de” is used in front of a second noun accompanied (determined) by the numeral, when thousands, millions and billions are rendered in words, and not in numbers: 20 “de” billions of euros.
1 leu---------------2-19 lei---------------20 de mii de lei
Exceptions:
a) After decimals numbers, abbreviations and symbols, preposition “de” IS NOT used
b) If the noun is abbreviated ex.: “m” for “milion”
1,25 francs---------2,85 francs-----------20, 45 francs
1 -----------------2-19 --------------------20 , 35 etc.
1 zi----------------2-19 zile-------------------1 m zile (for 1 milion de zile)
1 RON---------------2-19 RON------------20 RON, 58 RON etc
Source:
Ghid-practic-al-Departamentului-de-limba-romană-din-Direcţia-Generală-Traduceri-a-Comisiei-Europene (https://burgspatz.wordpress.com/ghid-practic-al-departamentului-de-limba-romana-din-directia-generala-traduceri-a-comisiei-europene/)
See on that page link to pdf (https://burgspatz.files.wordpress.com/2012/03/ghid-practic-al-departamentului-de-limba-romanc483-din-direcc5a3ia-generalc483-traduceri-a-comisiei-europene.pdf)
Look at the bottom of the page 21 the last 3 points.
Crowdin AdGuard has a form with triple option for number in romanian:
From 0-1
From 2-19
From 20-infinit
Can be used in Seek and iNaturalist also.