True, OK everyone has its own preferences but indeed ff7 missing looks surprising, didn’t see lot of city builders (not mentioning wolfenstein, fable, populous, Dk…)

This monograph was never translated in English. Taking a look at the original word “bavure”, a better (not the best) translation could be “blunder”.

Rule nb 5 https://en.m.wikipedia.org/wiki/The_Basic_Principles_of_War_Propaganda

As this is not mentioned, is it possible to extend the system by collecting rainwater falling on solar panels ?

Talking about apps I would recommend MosaLingua (digiSchool), it helps me for English and Spanish.

It’s mainly design to learn vocabulary (spaced repetition), the app is free, only class/courses may required a subscription.

Answering your initial question you can select the “native” language you want, but I’m afraid you won’t find your mother tongue.