The american expression "senior citizens" as a euphemism for "old people" disenfranchises non-citizens
The expression would make sense if used when you genuinely mean someone who has citizenship, but its current usage is just a synonym to “elderly folk”.
Someday you’ll learn about subtle discriminatory biases in language, which are often implicit and non-intentional, and how they have significant culturo-political effects.
There's nothing non-intentional or implicit about denying the franchise to noncitizens. For the vast majority of countries, that is the way citizenship is expressly designed to work as an in-group. Citizenship is generally meant to discriminate against outsiders.
This whole borrowed/discovered outrage at normal terms from people who aren’t even the subject of the supposed slight (in combination with people who ARE the subject, and ARE NOT offended) is so tiresome.
I don't usually hear people referring generally to senior citizens in other countries though, and even if they did, wouldn't they still be senior citizens, just citizens of their respective country instead of America?