A source has told the tabloid that shortly after signing for the Trotters, the German midfielder popped into a local McDonald's.
However, when he tried to order, he struggled to follow the Lancastrian lilt, despite having spent 8 years in England with Newcastle and Liverpool.
"Didi speaks decent English but with a heavy Scouse accent having spent 7 years on Merseyside," the source told The Sun.
"The Bolton accent is far different and he struggled to understand it. As he was already in two minds over whether he was making the right move or not, that convinced him he had made a mistake."
Hamann is then said to have called ex-City striker Robbie Fowler, who told him that the Mancunian accent is easier to understand.
Quite right, Blobbie owes us a favour or two!!