Languages Scope

The five of the most famous foreign language options for studies in India are Mandarin Chinese, French, Spanish, German, and Japanese. These languages are regarded as the most sought-after as far as career and prospect, employment opportunities and immigration are concerned.

Yes, of course you should learn Japnese, if possible to grow your career. Engineers from the city often have opportunities, make work trips to Japan and vice versa. Knowing the native language of a country is always an advantage, as it helps you connect well with these people. The company gives you

Each of the options mentioned by you need specific skill set. You first need to identify your core strengths and skills and then keeping in mind decide the program.
All the areas mentioned by you have good scope from a career perspective.