Tournament rules say that individual players can’t practice with players outside of their own school. Using this rule, the girls invite players to practice against their team.
Let's prepare the table in the meantime.
لنحضِّر الطاولة في هذه الأثناء
Mientras tanto preparemos la mesa.
Mientras tanto vamos a preparar la mesa.
Nous, nous allons préparer 
la table de mah-jong.
Nel frattempo prepariamo il tavolo.
Enquanto isso, vamos preparar a mesa.