From where [is it derived that] chalitzah [must be in Hebrew]? [With respect to chalitzah it is stated:] And she shall speak up and say (Deut. 25:9), and over there it states: And the Leviim shall speak up and say (Deut. 2:14). Just as the speaking up over there means in the Holy Tongue, here too [it means] in the Holy Tongue.  R’ Yehudah says: And she shall speak up and say, “So ...” —- [this] implies that she must say it in this [exact] language.