Final answer:
The celebratory mood in Kilanga in 'The Poisonwood Bible' dissipates due to cultural misunderstandings and inappropriate actions by the Price family, who fail to understand and respect local customs and the language barrier.
Step-by-step explanation:
In The Poisonwood Bible, the celebratory mood of the villagers in Kilanga soon dissolves due to the cultural misunderstandings and the actions of the Price family. The Price family carries with them luggage filled with items that are not suited for the life in Congo.
Furthermore, the Prices, particularly Nathan, are ignorant of the local customs and the language barrier exacerbates the situation. Their inability to effectively communicate and respect the customs of the Kilangan people leads to a series of unfortunate events that sour the initial celebration.