וְהִשְׁבִּ֨יעַ אֹתָ֜הּ הַכֹּהֵ֗ן וְאָמַ֤ר אֶל־הָֽאִשָּׁה֙ אִם־לֹ֨א שָׁכַ֥ב אִישׁ֙ אֹתָ֔ךְ וְאִם־לֹ֥א שָׂטִ֛ית טֻמְאָ֖ה תַּ֣חַת אִישֵׁ֑ךְ הִנָּקִ֕י מִמֵּ֛י הַמָּרִ֥ים הַֽמְאָרֲרִ֖ים הָאֵֽלֶּה׃
און דער כֹּהן זאָל זי באַשװערן, און זאָגן צו דער פֿרױ: אױב קײן מאַן איז ניט געלעגן מיט דיר, און אױב דו ביסט ניט אַראָפּ פֿון װעג אין אומרײנקײט הינטער דײַן מאַן, בלײַב אומגעשאַט פֿון דעם דאָזיקן װאַסער פֿון ביטערניש װאָס מאַכט פֿאַרשאָלטן.
Bartenura
אלו נאמרין. פרשת סוטה – as it is written (Numbers 5:19): “[The priest shall adjure the woman,] saying to her, [“If no man has lain with you, if you have not gone astray in defilement while married to your husband, be immune to harm from this water of bitterness that induces the spell].” In any language that he states it.
English Explanation of Mishnah Sotah
The following may be recited in any language:
the section concerning the sotah, The first is the oath that the priest makes a sotah swear (Numbers 5:19-23). The Talmud derives this by using a midrash. It may also be that since the sotah has to understand what she is swearing to, if she doesn’t understand Hebrew it can be recited in any language that she does understand. This rationale lies behind most, if not all, of the other recitations listed in this mishnah.
the section concerning the sotah, The first is the oath that the priest makes a sotah swear (Numbers 5:19-23). The Talmud derives this by using a midrash. It may also be that since the sotah has to understand what she is swearing to, if she doesn’t understand Hebrew it can be recited in any language that she does understand. This rationale lies behind most, if not all, of the other recitations listed in this mishnah.
Rashi
Gemara. We choose the textual variant: "And he shall say to the woman” [Numbers 5:19] -- in any language that she understands [Sifrei Bamidbar 12:1]; the Sifrei derives it from this verse. We do not choose the textual variant "And the priest shall say to the woman" [Numbers 5:21].