"grammatically correct" is redundant. Grammar is the CORRECT use of words. "Grammatically correct" can be likened to "a golden solid gold watch." ( FWIW, "a grammatical error" is also incorrect. It is a contradiction of terms. One might commit an "error in grammar." "A grammatical error" can be likened to "a BLACK white." )
“with the exception of” or “with the exceptions of”
"grammatically correct" is redundant. Grammar is the CORRECT use of words. "Grammatically correct" can be likened to "a golden solid gold watch." ( FWIW, "a grammatical error" is also incorrect. It is a contradiction of terms. One might commit an "error in grammar." "A grammatical error" can be likened to "a BLACK white." )