Sorry,George was regarded more German than the Kaiser,but Edward VIII had German accent,Queen Mary also...some citations:
"Victoria and Albert disliked London and choose to live at Balmoral because it reminded them of the North German countryside.Victoria often insisted that her family wrote and even conversed in German.Their son Edward VII spoke English with GERMAN ACCENT,which became much more pronounced when he lost his temper."
About Queen Mary:"In fact,George V's wife Queen Mary was the first Consort for over 400 hundered years to speak English as a first language,but she was almost 100% German and took pride in her pure Hanoverian descent,always quick to point out that her family was not tainted by any of Prince Albert's inferior Saxe-Coburg blood(maybe she forgot her grandmother Countess von Hohenstein...).Yet Queen Mary wasn't in the least embarressed to claim in her GERMAN ACCENT that she was English ''from top to toe",the oft-repeated claim of foreign royals living at the expense of British taxpayers."
About King George V's family and changing family name from Saxe-Coburg -Gotha to Windsor:"It was left to George V's palace counsellors to point out to him that he and his family were more German than the Kaiser''
Sorry,this doesn't hve much wit Dietrichstein family....