Another sad example of nuance being lost in the localization. If you're only paying attention to the subs, his confusion about the word "owner" might make it seem like he's balking at the concept of OWNING Pandamon, which will give you a different impression than what was probably intended.
The word they're saying in japanese is something like 'saponushi' which to me sounds like it's meant to be written as サポ主 a combination of Sapotama (the eggphone things) and Mochinushi which can be translated as owner or proprietor. So he's asking if he's the person who owns Pandamons Sapotama. And the show has invented the fake made up word of "saponushi" to refer to that concept.
Very much difficult to translate that into a single comprehensible english word. But using "owner" might convey the wrong impression to an english audience that's only looking at the subtitles and doesn't have an ear for the japanese language that they're actually speaking out loud.
If I wanted to be literal, maybe I'd have used "support owner" instead of just owner? Then the confusion of "I don't know what a support owner is" would make a little bit more sense. The subtitlers decided to just ignore the combination word aspect of the term probably for practicality reasons. I just worry about the way the english speaking audience will get the wrong impression about the story because of that choice.
He's not saying "owner? I don't OWN Pandamon" like you probably think based on the subtitles. He's literally saying "what the fuck is that word? I have no idea what that word means."




