TT #715 · Parashas Ki Seitzei · Seventh Aliyah · Passuk 25:07
And if the man does not desire to take his yevamah, then his yevamah shall go up to the gate to the elders and say: “My husband’s brother refuses to establish a name for his brother in Israel; he will not perform the duty of a husband’s brother for me.”
Torah Temimah points to Sotah / Sifrei.
TT lemma: וְאָמְרָה.
וְאָמְרָה – בִּלְשׁוֹן הַקֹּדֶשׁ.
English: “And she shall say” — in the holy tongue.
On the daf / in context: By analogy with other formal declarations that require Hebrew, the yevamah’s statement is preferably made in Lashon HaKodesh.
Derash requiring the holy tongue for the declaration.
The yevamah’s declaration should be recited in Hebrew.