Mandarin

Despite the complexity and difficulty of the language, there is no question that few languages will open up opportunities quite like Mandarin. It is the most spoken language in the world, spoken by around 15% of the global population. Fluency in Mandarin will allow you access to the largest global economy and workforce, comprising more than 1.2 billion people.

French

According to the British council, 49% of UK businesses list a proficiency in French as a highly employable skill. At the time of writing, France is one of the UK’s closest and most important partners in trade.

German

As the native language of the largest economy in Europe, proficiency in German will open a range of opportunities across the continent. Supposedly coming easy to native English speakers due to common roots, German can be a relatively simple language to master, thus making an excellent addition to any future polyglot’s repertoire.

Spanish

Spanish is the world’s second most widely spoken language. With almost 70% of US language students selecting Spanish as their language of choice, it is the fastest growing taught language in the world. Spanish has around half a billion speakers and becoming proficient in it can open doors in Spain, Latin America and certain parts of the US. Latin American economies, such as Argentina, Chile and Columbia, are some of the fastest-growing in the world.

Russian

Russia is one of the largest economies in Europe (it is on track to overtake Germany by 2030). Proficiency in Russian will open up a range of opportunities in the world’s largest country (by area). With Russia a regular and prominent player in world politics and current events, Russian translation is a highly sought-after for its diplomatic significance.

Quoted from: https://www.tomedes.com/translator-hub/languages-teach-children-career-prospects#:~:text=Not%20only%20do%20students%20studying,t%20speak%20a%20second%20language.