The French language opens doors for many jobs and career opportunities in France as well as French-speaking nations.
Some of the very commonly available job options are electricians, vets, medical professionals, and one can find jobs in tourism, agriculture as well as the retail sector. Despite these many options, we can see that French is not beneficial for mechanical engineers as there are various countries, for example, China, that offer more job opportunities to engineers than France. You might come across a work profile of a mechanical engineer but the chances of getting the job for an outsider is very low when compared to the other options.

Who can benefit from the French language?
Various gates learning French can open for you as mentioned above.
Tourism sector
It is a very highly flourishing sector. Proficiency in French is the key criterion required for working in this sector. You can work in France as well as India for French travellers and tourists.
Hospitality sector
As tourism flourishes, so do the hospitality sector. Both these sectors are co-dependent and often require the same skills. Nearly a million Francophones travel to India each year, and not to forget other countries as well.

Teaching sector
Having proficiency in French can land you some very nice opportunities in the form of a tutor, or a french teacher in schools and colleges. Since it is a popular language, and everybody wants to master it, it is quite evident they would require tutors for the same too. Thus creating job opportunities for you.
Healthcare and medical sector
France was among the worst-hit countries by the pandemic, with a loss of such a huge population which mainly consisted of frontline healthcare workers, France is in dire need of medical professionals and is hiring from across the globe.
What would benefit you as a mechanical engineer?
As mentioned earlier, France is not exactly the place for a mechanical engineer, so you must look for countries that are in front of production lines such as China, Japan, Germany, etc. these largely manufacture goods, automobiles, machinery, weapons, etc, which generates more than enough job options for mechanical engineers in the world.
