"This is a perfect marriage."
Translation:אלו נישואין מושלמים.
Marriage is plural in Hebrew. One might think of it as "nuptials", as in these are perfect nuptials. That's how it works in Italian, too. For example, the opera The Marriage of Figaro in Italian is Le Nozze di Figaro. Nozze is plural, and means marriage, but it may be related to the word nuptials.
Its a fault in AI algoritms, it also inserted for me much more advanced word from the material 2 levels up into a repetition lesson 2 levels down, as soon as l touched near that more advanced material, strangelly enough it did it only once and did not repeat this insertion, so its more AI learning what you need and how to deal with you