"Is everything OK?"
How would you change it from question to statement? Or you understand that by context?
I think it is only by inflection. Your voice raising at the end rather than a change in word order.
It is all controlled by the intonational center! When you want to change a declarative sentence to a question in Russian, you raise your tone. :)
I suggest googling "Russian Intonational Centers" for more info and perhaps video/audio examples for practice!
Do we know why все нормально isn't accepted? Хорошо has a more positive connotation to me, whereas нормально seems neutral/okay/fine.
There's no accents in the Latin letter keyboard that I can use instead of the Cryllic keyboard. I can only say, "Vse khorosho?" without the 'e' with two dots on top of the letter. Is there going to be an update soon with the accents?
Why not installing the russian language (visual keyboard on PC, or keyboard on Android ^.^)
If you look for Google Input Methods they have keyboards that overlay your Latin one and transliterate into another language by sound. I find it much better at my computer
I don't think it's as regularly used as in English. You could use it a bit, but not for this question.
You can say "Всё Ок" in real life,but it's not correct. Ok=Okay - english word not russian.
and why not " всё доброй? " ?
I checked with google translate, it translates to "everything good ?"
I've never heard that used. To me Добрый is an attribute of a kind or pleasant person, it feels a little weird describing it as how things are going.
You can. You need to install/activate your Russian keyboard for that, however. Google the appropriate instructions for your OS/hardware and you should be all set.