Appendix Probi. Bad-grammar. Einzelwort. Decline of Grammar - 83.12. Most of my fellow linguists, in fact, would say that it is absurd even to talk about a language changing for the better or the worse.
When you have the historical picture before you, and can see how Indo-European gradually slipped into Germanic, Germanic into Anglo-Saxon, and Anglo-Saxon into the English of Chaucer, then Shakespeare, and then Henry James, the process of linguistic change seems as ineluctable and impersonal as continental drift. From this Olympian point of view, not even the Norman invasion had much of an effect on the structure of the language, and all the tirades of all the grammarians since the Renaissance sound like the prattlings of landscape gardeners who hope by frantic efforts to keep Alaska from bumping into Asia. The long run will surely prove the linguists right: English will survive whatever "abuses" its current critics complain of.