There are countless reasons why you should learn any particular language, the biggest motivation to learn one of the most useful languages is professional. Being able to speak several foreign languages has become one of the assets for all.
Native languages
You can decide the language based on factors like the number of speakers throughout the world. According to the record, the top 10 most spoken native languages in the world are Chinese, Spanish, English, Arabic, Hindi, Bengali, Portuguese, Russian, Japanese, and German. You can also decide the language based on getting a job, or for abroad studies.

Russian
Russian is the sixth official language and is commonly spoken in 26 countries. With over 150 million native speakers in Russia, it is the most geographically widespread language in Europe.
Language uses
You can use your Russian skills to coach classes about travelling to Russian, working, or doing business there. By learning Russian, you can enter into engineering, Science & Technology, Oil & Gas, and defence sectors.

French
Learning French can majorly improve anyone’s professional worth. This language is spoken by nearly 290 million people worldwide and is the official language of 29 countries including France, Canada, and more. France dominates in pharmaceuticals, energy production, and more. If you communicate in French, then you will get tons of other jobs.
Language uses
French is also an official language of the United Nations, the Red Cross, and other international organizations. Due to the wide usage of the French language as the second language after English, learning French is extremely valuable, it opens the doors to positions in businesses all over the world.

Spanish
Spanish is an easy language to learn. Spanish is the third most spoken language in the world after Chinese and English, the native language of more than 400 million people, which makes it the most useful language to know. If you want to do business, learning Spanish will be an asset for communicating in Spain. The size of the Spanish-speaking people of the United States is also more. Americans who plan on working domestically in law will stand out by being proficient in Spanish.