Mishnayos Gittin Perek 9 Mishnah 8

With regard to a bill of divorce that was written in Hebrew and its witnesses signed in Greek, or that was written in Greek and its witnesses signed in Hebrew, or in which one witness signed in Hebrew and one witness signed in Greek, or if a bill of divorce has the writing of a scribe, and the scribe identifies his handwriting, and one witness verifies his signature, it is valid as though two witnesses testified to ratify their signatures. As for the wording of the signature, if a witness signed: So-and-so, witness, without mentioning his father’s name, it is valid. Similarly, if he did not write his name and instead wrote: Son of so-and-so, witness, it is valid. If he wrote: So-and-so, son of so-and-so, but did not write the word witness, it is valid. And this is what the scrupulous people of Jerusalem would do, i.e., they would sign without the word witness. As for the names of the husband and wife, if the scribe wrote his surname [ḥanikhato] or nickname and her surname or nickname, it is valid. With regard to a bill of divorce that the husband was compelled by the court to write and give his wife, if he was compelled by a Jewish court it is valid, but if he was compelled by gentiles it is invalid. But with regard to gentiles they may beat him at the request of the Jewish court and say to him: Do what the Jews are telling you, and it is a valid divorce.

גֵּט שֶׁכְּתָבוֹ עִבְרִית וְעֵדָיו יְוָנִית, יְוָנִית וְעֵדָיו עִבְרִית, עֵד אֶחָד עִבְרִי וְעֵד אֶחָד יְוָנִי, כָּתַב סוֹפֵר וְעֵד, כָּשֵׁר. אִישׁ פְּלוֹנִי עֵד, כָּשֵׁר. בֶּן אִישׁ פְּלוֹנִי עֵד, כָּשֵׁר. אִישׁ פְּלוֹנִי בֶּן אִישׁ פְּלוֹנִי, וְלֹא כָתַב עֵד, כָּשֵׁר. וְכָךְ הָיוּ נְקִיֵּי הַדַּעַת שֶׁבִּירוּשָׁלַיִם עוֹשִׂין. כָּתַב חֲנִיכָתוֹ וַחֲנִיכָתָהּ, כָּשֵׁר. גֵּט מְעֻשֶּׂה, בְּיִשְׂרָאֵל, כָּשֵׁר. וּבְגוֹיִם, פָּסוּל. וּבְגוֹיִם, חוֹבְטִין אוֹתוֹ וְאוֹמְרִים לוֹ עֲשֵׂה מַה שֶּׁיִּשְׂרָאֵל אוֹמְרִים לְךָ, וְכָשֵׁר: