"Good night, mom."

can we also say dobrey nochi ?? no ??

would dobrey nochi work too?

Доброй ночи-это вполне корректно. Такой ответ должен приниматься.

In one sentence, they use a conjugation of добре and in another they use спокойной for "good" and I haven't figured out if they are interchangeable or if they somehow depend on context.

Why is it ночи and not ночь?

Can we uses Dobriyi nochi here too? Or is Spok oinoi informal?

I cant write cause the rusian alfabeth

Are there masvuline and feminine ways to say "Good" ?

As a quick form of good night, like g'night, I've seen споки ночи

Heeey, how about a word bank?

The application wants me to type an answer in Russian but does not provide for a Russian keyboard. Nor did the App provide the "word bank."

I can't write russian

Why do you use "добрый" for "good afternoon" but "спокойнй" for "goodnight"?

Мама неь матка?

Can i say it if i want to say "quiet night" or "calm night"?

I wrote it in Latin letters as "Spokoynoy nochi, mama", perhaps make different transliterations correct? I could have easily also written "spokojnoj nochi, mama" or something else.