ייִדישער מחשבֿה אויף מלכים ב 18:26

They have authors and poets who communicate fluently and beautifully. We have not bothered to learn from them or raise our children this way. Rather, we have become accustomed to raise our children under the tutelage of teachers from Poland who speak German improperly. Our sages would not have been satisfied with this, for they said that the members of the Sanhedrin had to be fluent in all languages and not rely on translators. King Hezekiah’s men, who were all righteous and good hearted, said to Rabshakeh “Speak to us in Aramean, for we understand it, etc.” (II Kings 18:26) The leaders of Jerusalem spoke Hebrew perfectly but also learned Aramean which was the language of Ashur.