The language you wish to learn is mostly determined by the field in which you work in
Let us briefly describe about the 3 languages.
Out of these three languages, I'd say German is the most difficult but also the most helpful, because Japanese and German are the languages with the highest demand in our period. Knowing German may assist you a lot in many careers.With so many German and Swiss projects all over the world, German translators are in high demand. So if you're looking for new challenges and opportunities, this is the one for you.
Spanish is one of the most widely spoken languages in the world; in fact, spanish is the most widely spoken language in the world, with more than 20 nations using it as their official language, including Argentina, Mexico, and Spain, and it is also a good business language! Spanish translators are in high demand all around the world.
Another strong advantage of learning spanish is that it is similar to other romantic languages such as portuguese and italian, so you can learn them in a fraction of the time if you already know spanish. I know this because I have a diploma in spanish and am currently learning portuguese, which I am finding relatively easy due to its similarity to spanish.
There are so many nations and cultures to explore, so if you're a traveller who enjoys learning new things, Spanish is your greatest friend!
French is regarded as one of the most beautiful languages in the world. Although I do not speak French, I enjoy listening to French music.
Because of the global reach of French trade and business, there are several opportunities for French translators.
NOTE:For example, if you are doing civil engineering, you may want to select French, but if you are studying mechanical, automotive, or computer science, you may need to choose Deutsch (German).
Hope this helped