Is it permitted to deviate from the standard zimun nusach — e.g., saying 'al ha-mazon she-akhalnu,' 'le-mi she-akhalnu mi-shelo,' 'mi-tuvo' instead of 'u-v'tuvo,' or 'chayyim' instead of 'chayinu'?
Synopsis
Any deviation from the standard zimun nusach renders the leader an ignoramus ('bur'). Each variant formula is prohibited for specific semantic reasons analyzed by the Rishonim and Acharonim.
More in Zimmun and Joining Groups
Is zimun (invitation formula before Birkat HaMazon) obligatory when three or more adults eat together?
2 opinions
Should the mezamen (leader) say 'Nevarekh' (let us bless) or may he say 'Barekhu' (bless!) when leading zimun?
3 opinions
Should the mezamen add 'u-v'tuvo chayinu' (and by His goodness we live) in his opening formula 'Nevarekh she-akhalnu mi-shelo'?
6 opinions
Should the assembled diners answer 'Amen' after the mezamen concludes his response ('Baruch she-akhalnu mi-shelo u-v'tuvo chayinu')?
4 opinions
Should 'Baruch Hu u-varuch Shemo' be said after the mezamen mentions God's name in the zimun formula?
5 opinions
When zimun is said with ten or more, must God's name ('Eloheinu') be mentioned in the zimun formula?
3 opinions
Is it permitted to say 'Nevarekh l'Eloheinu' (with a lamed prefix — 'to our God') in the zimun formula?
3 opinions
Before zimun, should one verbally announce the intention to bentch (recite Birkat HaMazon)?
3 opinions across 3 eras
Related from other topics
Is it permitted to request communal needs (e.g., Ya'aleh v'Yavo, Zochreinu l'Chaim) during the first three or last three blessings of the Amidah?
Qualifications of Prayer Leader
Is it permitted for an individual to mention rain before the prayer leader (chazan) makes an announcement or begins saying it?
Rain Request (V'Ten Tal U'Matar)
Is it permitted to recite the verse 'Heal us, O God' (Jeremiah 17:14) in the plural form ('Heal us' instead of 'Heal me') in the Amidah prayer?
Insertions in Birkat HaMazon
If one asked for rain in Shomeya Tefilah instead of the Blessing of the Years, must one return?
Shabbat Shemoneh Esrei
If one said 'Melekh Ohev Tzedaka u'Mishpat' during the Aseret Yemei Teshuvah instead of 'Ha-Melekh Ha-Mishpat', must one repeat Shemoneh Esrei?
Shabbat Amidah — Additions and Errors
Is it permitted to recite a blessing over tzitzit that are valid only according to the first (lenient) opinion, against Rabbeinu Tam's standard?
Minimum Length for Valid Tzitzit
Discussion
Discussion coming soon.
The Daily Law
One question. Every opinion. Every morning.
A new halakhic question and the full spectrum of rabbinic thought, delivered daily.