What are common gramatical errors in the Spanish language?

Question

I need examples of grammatical phenomenon in the Spanish language for an assignment. What are some common or uncommon grammatical mistakes that I could research?

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Answer 1

This one is one educated speakers hate- at least in my experience. I am told every time this is bad grammar, not an accepted variant.

Terminating the tú preterite with an "s".

Source (not on what I said above, but the occurrence of it):

http://spanish.stackexchange.com/questions/1435/s-final-en-tiempo-pretérito-indefinido-astes-istes

Español

La segunda persona singular del pretérito indefinido generalmente termina en "-aste" o "-iste". En muchos lugares, la gente agrega una "s" final a estas palabras (por ejemplo, hablastes en vez de "hablaste", o "dijistes" en vez de "dijiste"). Si la forma correcta es sin la "s", ¿por qué mucha gente agrega la "s"? ¿Esto se limita a regiones específicas, o es común en todo el mundo hispanohablante?

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English

The second person singular of the preterite tense generally ends in -aste or -iste. In many places, people add a final s to these words (for example, hablastes instead of hablaste or dijistes instead ofdijiste). If the correct form is without the s, why do many people add the s? Is this limited to specific regions, or is it common throughout the Spanish-speaking world?

One of my major complaints as well - 005faa61, Sep 29, 2016

Answer 2

Here are some more. "Nadien" for "Nadie"

And "Siéntesen" for "Siéntense."

Finally "nomás" for "nada más" (as a synonym for solamente)