I don't mean to beat a dead horse, since I think we will all have to eventually just agree to disagree. However, I just wanted to point out that languages absolutely, positively evolve and as they evolve, the new words, grammar structures, etc. are considered wrong. Until, of course, they become mainstream enough that someone declares that it is acceptable and even proper. Language, just as culture, is dynamic. It moves, it flows and it will always continue to change. I am not saying that "hablastes" is evolving to become a new "correct" form of speech (although it might); all I'm saying is that it is not our right or in our power to say that a form of speech is unacceptable.
Below are some examples of Old English, Middle English, and Early Modern English. We're all aware of what Modern English sounds/looks like, so you can come to your own conclusions about what the speakers of the following English samples would have said about how we speak.
Old English (from Beowulf--900AD)
Hwæt! We Gar-Dena
þeodcyninga,
hu ða æþelingas
Oft Scyld Scefing
monegum mægþum,
egsode eorlas.
(Translation: Lo, praise of the prowess of people-kings of spear-armed Danes, in days long sped, we have heard, and what honor the athelings won!)
Middle English (from the Canterbury Tales, by Geoffrey Chaucer--14th century)
Here bygynneth the Book of the Tales of Caunterbury
Whan that Aprill, with his shoures soote
The droghte of March hath perced to the roote
And bathed every veyne in swich licour...
Early Modern English (from Othello, by William Shakespeare--1603AD)
Iago:
Though in the trade of Warre I have slaine men,
Yet do I hold it very stuffe o'th' conscience
To do no contriu'd Murder: I lacke Iniquitie
Sometime to do me seruice. Nine, or ten times
I had thought t'haue yerk'd him here vnder the Ribbes.
Othello: 'Tis better as it is.