Congratulations! The bafflement does translate - Ravirn's question is easy enough to understand - but Nihlus doesn't answer immediately, trying to find a way to get his answer across the language barrier. After a couple of seconds of thinking, he points at his ship and shakes his head - it's damaged and running out of fuel. Next... next comes the part most quite possibly most relevant to Ravirn's interests.

Nihlus activates his omni-tool - it looks like a holographic orange "glove" over his arm, but it's clearly not just a projection, as Nihlus actually starts typing something into it. This will need a little bit of work on his part, as he will need to access his ship's databanks instead of using the omni-tool's built-in computer - but after half a minute or so a small, relatively crude hologram of the solar system pops up over his omni-tool. Nihlus proceeds to quickly point at all the planets starting from Neptune to Mars and shake his head, and then nod when he points at Earth. Your planet was the only one that had life.