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
'And' in Russian is spelled 'u'.
In Russian, "Caitlin" can be spelled as "Кейтлин."
"Как ты?" is how you spell "How are you?" in Russian.
Tranquility in Russian is "спокойствие."
Винтовка is rifle in Russian.
Папа is dad in Russian.
Кэти is Kathy in Russian.
That is the correct spelling (capitalized) of the word Russian (Русско in Russian).
In Russian it is spelled - тоска.