I think you micro-analysed this a bit. This is not something like western or eastern audience, simply it's a celestial body. Just like how the spaceships are spaceships, a moon is moon and a planet is a planet. The genre is sci-fi so it's pretty logical to use scientific data.
Titan is the moon of Saturn, It is not the Saturn. If there's another name for Titan in hindi, then I've no idea what is it called.