It's Ruthenian!

The frigid waters off the Valorian coast were deceptively calm, cloaked in darkness and secrecy. Beneath the ocean's surface, the Valorian submarine lurked in the depths, a silent predator poised to strike. Its sleek, dark hull blended seamlessly with the shadowy currents, rendering it nearly invisible to those who dared trespass into its territory.

Inside the submarine, the command room pulsed with an urgent tension. The red glow of emergency lights cast deep shadows, painting the determined faces of the crew in sharp relief. The rhythmic beeping of the sonar punctuated the low hum of machinery, the only sound in an otherwise suffocating silence.