Commentary for Esther 1:22

וַיִּשְׁלַ֤ח סְפָרִים֙ אֶל־כָּל־מְדִינ֣וֹת הַמֶּ֔לֶךְ אֶל־מְדִינָ֤ה וּמְדִינָה֙ כִּכְתָבָ֔הּ וְאֶל־עַ֥ם וָעָ֖ם כִּלְשׁוֹנ֑וֹ לִהְי֤וֹת כָּל־אִישׁ֙ שֹׂרֵ֣ר בְּבֵית֔וֹ וּמְדַבֵּ֖ר כִּלְשׁ֥וֹן עַמּֽוֹ׃ (פ)

for he sent letters into all the king’s provinces, into every province according to the writing thereof, and to every people after their language, that every man should bear rule in his own house, and speak according to the language of his people.

Rashi on Esther