This article mainly focuses on the schemes of three pan-nationalist zonal constructed languages, namely, pan-Romance, pan-Germanic and pan-Slavic regional auxiliary languages, to illustrate the language environment from the perspective of geopolitics and history. In addition to clarifying the historical and political background and the geographical distribution of these three constructed languages, the contents of mainstream schemes will be discussed, primarily from the perspective of linguistics. Naturally, this article will also discuss international auxiliary languages such as Esperanto, as necessary.