The argument against just awarding an A* to the top 5% of students is particularly a problem in modern languages. No matter how hard a student works, they are never going to get to the same level as a native speaker.
No, it will just mean that the native speakers SHOULD get an A (then again a lot of English kids do not get A in English)
and that an A grade from a monolingual child is an excellent result.
The point is that 53% of candidates for an exam getting an A or A* devalues both
and for the kid doing Greek - even if the cohort is only 1000 kids nationally, the standard deviation will be under 2% do the grade bandings will be valid despite minor variations in year groups.
Remember that Latin GCSE is taken by a lot of comp schools (over 30 in DDs school) so that cohort is quite big.
The public schools will NOT want normal distribution as narrowing the number of students who get an A might just let some of those nasty state oiks push them down to B grades.