Dans ton texte, il y a pleins de fautes d'orthographe. Il m'a falu, donc, tout coriger et ensuite de faire la traduction ci-dessous :
In all, the trip cost him 4,000 euros. It was hosted in a family. This trip allowed him to strengthen his English, learn new cultures and meet new people (or meeting). Through this journey, Leah had good grades in these examinations, it gained independence, it was full of new knowledge. She did not regret avaoir took a year (yea gap) because it has it been beneficial to him! Count it well again one day!