Mr English, who is responsible for the flag referendum process, said he had asked the Electoral Commission about the accuracy of the voting papers.
"You certainly don't want voters in any way confused," he said.
"As I understand it's the same ballot paper ... but the wordings might be different."
He said the ballot papers were "self-explanatory" but if any paper was different "even in a small way" it needed to be investigated.
Asked about speculation that the mistranslation was deliberate, he said: "I think that's grossly overstating it."
Mr English would not comment on how it could affect the flag vote, saying he would wait until the commission reported back.