From: Piotr Gasiorowski
> Note in this context that progressive palatalizations are lessThere have been progressive palatalisations in the history of Germanic
> frequent than the common or garden type of palatalization of velars
> followed by front vowels. For that reason beginning linguists tend to
> be unaware of them and uneasy with them. Rules that strongly resemble
> the Slavic Progressive Palatalization have been reported for some
> Andi languages of the Caucasus, notably Tindi and Godoberi.