I don't think there is the most worthwhile major. It depends on which major you like, such as which country you like and which country you are interested in.
No matter which one you choose, you need to study hard by yourself.
If we say how to measure it, we can also consider the overall situation of this language country; Do you like the culture and lifestyle of countries that speak this language? What does it have to do with our country? French, Spanish, Portuguese, Japanese, German, Arabic, Indonesian, Russian, Italian and Korean should all be quite good. Czech, Romanian, Serbian, Hungarian, Bulgarian, Albanian, Finnish, Slovak, Burmese, Thai, Indonesian, Malay, Sinhalese, Turkish, Korean, Swahili and Hausa are also spoken in northern China.
I majored in Chinese international education, and the development prospect of this major is closely related to the relationship between countries. With the development of China and more people learning Chinese, the employment situation of our major will be better. But the main conclusion is that China people are the state religion. In China, if the salary level is not good, you still have to change careers. If the domestic wage level is higher, I should continue to do this job.
Small languages should not have this problem. Employment prospects should be good. You can be a translator in the future. Going abroad is not bad, and working in China is not bad. Studying a small language at Beijing Foreign Studies University should have a good career prospect in the future. Some rare small languages can come in handy in many cases. The most important thing is to choose your favorite small language.
Thank you for reading, I hope it will help you ~