In Swedish, "sun" translates directly to "sol".
And we have different forms, like "solen" -> "the sun", "solar" -> "suns", "solarna" -> "the suns" etc.
But we don't have different forms for proper names.
I bought one of these when I lived in Germany. The first time I used it I was so afraid it was going to explode I hid behind the walls. But it quickly became my best friend. 🙂
I found the resonant frequency of my shower cabin and now all I do in there is hum surprisingly loud.