You have increased the number of international staff members in your German offices and your meetings are held in English the moment a non-German speaking staff member is attending. This is all in line with your having implemented English as your official company language.
But communication is a two-way street and everyone would definitely benefit when your international staff could also communicate in German and meet your German speakers halfway.
So do get in touch with us. We would be happy to arrange group or individual courses for you.