I've lived Germany for the past 6 years. Anything "official" here is all in German and only German. I can say that the attitude of "we speak murican" is not really the best way to get people to assimilate to a place.

Because my German isn't absolute perfect and there is no other option other than speaking German when it comes to things like Visa appointments, getting a driver's license, paying bills, etc. I'm often hung up on over the phone, refused appointments, it flat out screamed at when I don't immediately understand something. After 5 years of this, I've not only started to actively avoid these interactions, I've decided I'm done with Germany and will be moving away in 2 months, despite really trying my best to live here.

Having an option to at least communicate in a common shared language would make me %100000 more willing to stay and "assimilate"

America is and always had and always will have an extremely diverse population and for those who have just arrived, having at least a way for them to navigate their assimilation process in a language they are maybe a bit more comfortable with would be a massive help and probably speed up the process.