Non-Jews' obligation to make berachot over food

Question

Are non-Jews themselves required to recite berachot before and after eating?

According to this for e.g., one is obligated to insist that guests and anyone one gives food to should make a beracha over it, and it doesn't say that it is referring only to Jews. Does this also apply to non-Jews, and if so does that imply that they should do so themselves in any case?

According to the Midrash, eating with a beracha is something Avraham insisted on when feeding his (presumably pagan) guests (Midrash Genesis Rabbah 54:6):

על דעתיה דרבי נחמיה דאמר אשל פונדיק: אברהם היה מקבל את העוברים ואת השבים ומשהיו אוכלין ושותין אמר לון: בריכו! והן אמרין: מה נימור? ואמר להון: ברוך אל עולם שאכלנו משלו, הה"ד (בראשית כא:לג): ויקרא בשם ה' אל עולם

According to the opinion of R. Nehemiah, who said that “tamarisk” (אשל) is an inn, Abraham used to receive all the wayfarers, and when they would eat and drink he would say to them “Bless!” And they would say: “What should we say?” And he would tell them, “Blessed is the Eternal Lord that we have eaten of His [bounty].” That is as is written (Gen 21:33), “and there he called on the name of the Lord, the Eternal God”

I heard that this, i.e. calling upon gentiles to bless, is halacha but I never heard the source.

If so,

• Which language?
• Which text?
• For non-kosher food?
• Same question for other nehenin (pleasures).
• Saying amen
• Must one insist they do so if offering them our food, like Avraham and the pagans?

Note, this and this simply ask if they are allowed, but I wish to know if they are obligated, and their laws.

Answer 1

R. Yehudah ibn-Dannan wrote (Qol Yehudah, p. 98):

ועל דעתיה דרבי נחמיה דאמר אשל פונדק אברהם היה מקבל בשמחה את העוברים ואת השבים ומשהיו אוכלין ושותין אמר לון בריכו ואינון אומרים מה נימר ואמר להון ברוך אל עולם שאכלנו משלו הה"ד ויקרא שם בשם ה' אל עולם פירוש אמר לון בריכו אעפ"י שאין ברכת מזון ממצות בני נח היה עושה כן להודיע את שם הבורא והיה אומר שמדרך המוסר שיברכוהו ויודו לו על טובתו

And according to the opinion of R. Nehehmiah, that an אשל refers to an inn, and that Abraham would receive all of the wayfarers with gladness and when and when they would eat and drink he would say to them “Bless!” And they would say: “What should we say?” And he would tell them, “Blessed is the Eternal Lord that we have eaten of His [bounty].” That is as is written (Gen 21:33), “and there he called on the name of the Lord, the Eternal God” - and the meaning of the fact that he would tell them to bless, is that even though blessing over food is not one of the Noahide commandments, he instructed them to do so in order to cause them to know the name of the Creator, and he would tell them in the vein of an ethical instruction (derekh mussar) so that they would bless and acknowledge His goodness.

According to R. Yehudah ibn-Dannan, there is no Noahide obligation to recite blessings over food. Abraham instructed wayfarers to bless not because they had a duty under Noahide law but rather because it was an opportunity to share with them knowledge of our beneficent Creator.