I agree that English has reached the Latin status today, but - in the bigger picture - it's just spoken by a cosmopolitan elite, most of the people don't speak it or they don't speak it well.
So, there is always a strong case for doing science, or everything, really, in your local language, especially if you want to be really inclusive.
p.s. I am not saying that people shouldn't strive to learn english, but there is a BIG case to use your own language, both for science and business.