"We must protect both Ukrainian and languages of the national minorities in full," he said on Ukraine's ICTV channel, noting that the position on this issue should be consistent.

Read alsoPresident Poroshenko signs into law bill on education"The situation when there are people who cannot speak Ukrainian at all is, after all, a matter of our unity and national security. I understand this way and I will continue promoting [the concept]," Klimkin said.