Benefit to whom? I only see a benefit to the companies and government here (saving money), but it seems to me that you've forgotten to consider the people.
It would be nice if government letters were written only in English. I.e. getting an 8-page letter with only one page in English is annoying for the people. I pay for that with my taxes and would wholeheartedly support a bill to stop doing that and reduce taxes or increase spending somewhere else that matters more, like road maintenance.
Well, I'm sure when your neighbor gets their 8-page letter in Spanish, Vietnamese, Russian, or whatever their language might be, they too find it annoying that the government finds it necessary to send them a letter in English. I mean, what a waste, right?
The logic of how you get from there to road maintenance... my god, the mental gymnastics it must take.
I think the context you’re deliberately omitting is that we’re talking about the US, not Vietnam, Spain, Mexico, or Russia.
If you moved to one of those countries, you’re saying you would demand official government programs be in English? That seems arrogant to me personally.