He says it like it's somehow a consequence that will upset someone. I will admit, that had I the time, inclination or skills to break into his social media, stuff like changing languages would be a perfect way to fuck with him. It's annoying, hard to fix for someone who is terminally stupid, and ultimately harmless.
The YouTube thing he was bitching about in the beginning was obviously him not understanding that viewing from his account is different from someone viewing from outside. He's fucked this up before.
He's just so bullheaded that he is right, and ready to blame anything else when he makes a mistake. The occasional real troll action has made this easier for him.
He does it IRL too. He insists he's covered by a warranty, waves it around, then when he finally does an in depth reading of it, tries to pretzel it so he's right, figures out he's wrong, then explains why it shouldn't apply to him.
There's a basic checklist of character traits for lolcowism, it seems, and IMHO, two of the top ones are inability or unwillingness to accept responsibility, and USI. Both of which Bob has in spades. It's why he's been here for years, even with dry spells.