Playing on international servers of MMORPGs and Second Life, I am forced to write English all the time and since now others only recognized my roots are german, if and when I told them. Also the master part of my study at university will be up to 50% in english as I heard. But even if it would not be: For my kind of job I am interested in, I have to speak English fluently, have to understand customers, if they speak and cannot ask after every sentence "Can you repeat this please?". I think it is necessary to speak at least your own language perfectly and be able to speak English, perhaps another language. But I am very sad I succeded "Great Latin" and cannot use it for my further business ^^ (Or I have to find a job I can combine with Jura/Medicine/Theology).