The king sent a decree throughout the provinces stating that each man should be master in his own household and speak according to his own language (Esther 1:21–22). The decree was written and circulated across the empire’s peoples and languages (Esther 1:22).
In Esther 1:21–22, the king and his officials approve Memucan’s advice after Queen Vashti’s refusal. The king acts on that counsel by sending written orders throughout the empire. The letters are tailored to each province’s script and each people group’s language. These verses conclude the first chapter’s court crisis. Vashti’s refusal has been framed as a challenge that could spread socially if left unanswered, so the advisors move from describing the problem to proposing a public remedy.
Esther 1:21–22 closes the opening palace crisis by showing how a private conflict becomes official policy. The king accepts Memucan’s advice and acts on it. The story highlights the reach of Persian power: orders go out to every province, and they are translated into local scripts and languages so they can be understood and enforced.
A careful answer keeps the immediate passage, the book's argument, and the whole-Bible storyline together, so the question is answered in context instead of as a detached idea.
Start with Esther 1:21-22, then read the surrounding section so the answer stays connected to the passage's flow.
21The saying pleased the king and the princes; and the king did according to the word of Memucan:
22for he sent letters into all the king`s provinces, into every province according to the writing of it, and to every people after their language, that every man should bear rule in his own house, and should speak according to the language of his people.