The flag of Denmark is just like the Norwegian flag without the blue cross The flag of Austria is Denmark's flag without the vertical line. The flag of Georgia (US State) is Austria's flag with a coat of arms in the top corner. read more
The similarity you are referring to is that both contain a cross and a saltire : it not unfortunate but the design of the Ikurriña (Basque flag) in 1894 has been inspired deliberately by that of the Union Flag (UK flag) because this was the first economic power in the world and also because the region had had a long history of trade with UK. read more