The word <em>impeccable </em>stands out in the excerpt due to the other adjective <em>broken</em>. The ironical use of <em>impeccable </em>clearly points out that, although her mother shouts in <em>broken </em>english - anything but <em>impeccable - </em>she manages to be effective, nay, maybe even more powerful in expressing her greeves to the boss.
