Mistakes we make while speaking English

1.Every word in capital letters.??!! What kind of grammer it is?
2."The Term 'Don't' Applies When Discussing A Plural Subject".... Seriously??!!
3."Unfortunately, The Word 'Didn't' Is Never Followed By A Past Tense Verb"....Fortunately, still it doesnt....

Reading many of the posts in HR itself shows a range of common mistakes in English.
There was a query about leaves,while it should have been leave.
People start sentences with small letters and do not know when and where to use capital letters.
People use the word "the" everywhere-I went to the Delhi.
Due care and use of spell check feature in our software can reduce instances of poor English.People should confine SMS words only to SMSes originating from your mobile.Please is not plz, you is not u and that is not dat in respected forums like this where one is seeking information from or giving knowledge to to others.

Some errors in posts at Cite Hr
"Whether" is spelt as ""weather""
Break is spelt as Brake
Wrong use of capital letters in between sentences/
Paid leaves-should be "paid leave""
The word "The" gets used inappropriately- like I am from the Delhi.
Some care,use of spell check and dictionary can help us write better.

Thank You!
I was looking for such common mistakes that people make while speaking in English and this was the most informative post that I found.
Thanks again.
English Speaking Delhi