>>8
Why must >>1 do your thinking for you?

> By law, only US citizens can vote.

This implies that to vote without breaking the law, you must be a US citizen.

> By law, to become a citizen you have to demonstrate proficiency with the English language.

This implies that to become a citizen without breaking the law, you must be proficient with the English language.

Therefore, if you are an immigrant, to vote without breaking the law you must be proficient with the English language.