After the year 2045, Japanese language loyalists and French language loyalists clashed over territories that had either Nihongo or Francais as the language of prestige. Over time, even after the horrors of civil engagement receding into distant memory, one of the many compromises was having to learn both Japanese and French. Originally the two language were meant to be separate, but over time memory techniques for remembering the difference between French and Japanese words came about to have them keep straight what was Francais and what was Nihongo.

There are sections of this world where it's still common to here cross-over dialects, similar to the way Alsatian German differs slightly from Deutch. Eventually there came to be special word classes specifically for words that act as hybrid compound words, and taking on a slightly different meaning from mainland French or Japanese. There also came to be additional word classes whose main purpose is leveraging entire squads and units in an efficient manner.

Yumemoire, the title, specifically refers to "dream-fabric", an ambiguous state between being awake and dreaming, where it's not clear what is real and what it not, and traveling using a dream-fabric to different gothic landscapes. This is the ambiguous dream like world I will be basing these language learning games.