For the US to institute a language standard, we'd first have to agree on an official language at the federal level.
There's a (fairly basic but extant) English language requirement for naturalization, so it doesn't seem inconceivable that could be applied to a visa.
alt Hacker News
There's a (fairly basic but extant) English language requirement for naturalization, so it doesn't seem inconceivable that could be applied to a visa.