Which languages should I get a degree in?

Well red snail, I would say definitely Spanish. Approximately 400 to 500 million people speak Spanish and that number is growing. It is one of the official languages of the United Nations and of the European Union. Also, the population of Germany is on the decline. If you're set on French then by all means go for it. It sounds like you have a basis in French German and Spanish and I presume, English. I wouldn't try to take on too much but do try to use the languages you speak enough so that you don't begin to lose them.