Not to rain on your parade, but literally 90% of the Japanese text in this game is encrypted. PokeStation is working on a full translation that will include the encrypted story text: http://forums.pokestation.net/showthread.php?13925-Translation-project-for-Pokemon-x-Nobunaga-s-Ambition
If you decide not to finish your translation, then please consider contributing your files to PokeStation's translation.
While I know you mean in case of someone confusing schooling establishment from shooting establishment (many of the same letters) I am still going to read that as lockdown (also known as lock in) for a pub
being drunk in school was either because drunk on playing field or could not be arsed with one particular Thursday afternoon so went and had some beers and played some games instead before returning for an ill advised last lesson/period