What you should learn depends on your interests. Curious about metallurgy? Then German holds a great reservoir of hard won knowledge. Culture, aesthetics, an

What you should learn depends on your interests. Curious about metallurgy? Then German holds a great reservoir of hard won knowledge. Culture, aesthetics, and hard math? There French has profound influence. And so on. Buddhist wisdom is scribed in Sanskrit, Hindi, Chinese, and many others. Extend and spread your knowledge using whatever language and idioms are most appropriate and useful.