In the future I would like to use my English skills and contribute to world peace.
In my career I would like to use English and be part of making world peace.
In the future I would like to use my English skills and contribute to world peace. ＝将来自分の英語スキルを使い世界平和に貢献したいです。
I would like to use my English skills = 自分の英語スキルを使いたい
contribute to world peace = 世界平和に貢献
In my career I would like to use English and be part of making world peace. ＝ 自分のキャリアの中で英語を使い世界平和を築く一員になりたい。
In my career = 自分の仕事の道（キャリア）
I would like to use English and be part of making world peace. = 自分は英語を使い世界平和を作る・築く一人・一員になりたい。
自分はエンターテェナーとして世界平和の中で笑い、笑み、不思議な感情が生まれるよう自分磨きをしてます。一緒に頑張りましょう！
My ambition is to get a job that would help bring about world peace...That is my motivation, for learning Englsh
Its good to be properly motivated in life...in this case a mission to bring about world peace! No small task! This sentence will help establish that we have an ambition and we are motivated to see it through.
My ambition is to get a job that would help bring about world peace...That is my motivation, for learning English
人生においてきちんとした目標を持つことは良いことです。この場合は、世界平和をもたらすことです。決して簡単なことではありません。この文を使えば、大きな目標があり、その実現に向けてやる気になっているということをはっきり伝えます。
例文
My ambition is to get a job that would help bring about world peace...That is my motivation, for learning English
私の目標は世界平和をもたらすことが出来るような仕事につくことです。このことが英語を学ぶモチベーションになっています。
I want to use English as a vehicle for spreading the idea of World peace- which explains my motivation for learning Englsih.
You explain exactly what drives you to study and learn to continue improving your range of English skills.
"Hey, why do you study so late at night and at weekend? You never seem to have time for anything else."
"Well, let me explain. I want to use English as a vehicle for spreading the idea of World peace- which explains my motivation for learning Englsih."
自分の英語スキルを成長させ続けるために勉強するそのモチベーションが何なのかを的確に説明できます。
"Hey, why do you study so late at night and at weekend? You never seem to have time for anything else."
こんな週末の夜更けになんで勉強しているんだい？それ以外の何かをする時間がないようだな。
"Well, let me explain. I want to use English as a vehicle for spreading the idea of World peace- which explains my motivation for learning English."
ちょっと説明させてくれ。自分の世界平和の思いを世界に広げるための乗り物として英語を使いたいんだ。これが英語を学ぶモチベーションなんだ。
I want to learn English to contribute to a program that promotes world peace.
I want to learn English to take part in a world peace program.
We can say that we want to learn English because we want, "to contribute," to a program that helps, "promote world peace." We can also talk about, "taking part in a world peace program," interchangeably to mean the same thing.
アメリカ合衆国 
南アフリカ 
イギリス 
日本 
