Paul Mison pointed me at this very odd twitter. It’s from a phone, so it seems unlikely that is was supposed to look like this. It contains ‘@s@t@r@a@ @e’ – that was supposed to be ‘Straße’? So this is probably a Windows Mobile phone falling back to UTF-16 / UCS-2 to send non-ascii. Every other phone I’ve ever see falls back to UTF-8 to do this.
Don’t you just love windows?
Updated: this one worked..