Wait, if french politic and french nationality don't matter to him, why was he in the french foreign legion at the start ? Getting the french nationaly is like 90% of why you would want to join it.
@BalrogDeMorgoth
He is in a different body now compared to before, and his objective is different from before so maybe that's why he is not interested anymore. Also from skimming the first two chapters it seemed like the MC originally spoke french but could also speak Korean as a second language.