Not exactly 'stand firm on your decision' = you will not change your decision. 'stand on your ground' = you will not move your position/viewpoint.
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New2grammarThanks, Nona.I must admit that I didn't spot it at first.
Optilang, is on optional to you?
CalifJimstand on your principles; stand on ceremonyCould use to?
OttoJ- John stood firm __ his identity as an Irish.- John stood firm __ his identity as an Irish man or as an Irish citizen.