In Russian, "Любимая" is how to say/spell sweetheart.
В is at in Russian.
да in the Russian language, or "da" is how you spell it in English
"Как ты?" is how you spell "How are you?" in Russian.
In Russian, "Caitlin" can be spelled as "Кейтлин."
Винтовка is rifle in Russian.
Папа is dad in Russian.
Tranquility in Russian is "спокойствие."
Кэти is Kathy in Russian.
That is the correct spelling (capitalized) of the word Russian (Русско in Russian).
"Ilya" in Russian is spelled as Илья.
In Russian, "Tommy" can be spelled as Томми.