mitteleuropa
German word for central Europe. A related term is Plan mitteleuropa witch refers to the Prussian military expansion to eastern Europe. The idea was to colonize much of eastern Europe and exploit them for economic reasons. It (Plan mitteleuropa) laid the groundwork for the Nazi policy of Lebensraum.
Even if many people nowadays say Hungary is in eastern Europe, it is actually in mitteleuropa or central Europe as we say in English.