I am planning on learning a new language in the upcoming year. I already have a B1 level of french and had thought about perfecting it. However, I was told that German was more useful as a physicist as it would open career paths in Germany and postgrad opportunities after undergrad, the only problem is that I have no knowledge of the language which is why I would have to start from 0. I have to choose only one of the languages as I have a limited amount of time and my goal is to learn as much as I can over the course of year (with intensive courses). Do the benefits of German for a physicist outweigh the fact that I already know some french? What language is better for a physicist career wise and for postgrad studies?