Like Mrs. S's question below, this may be more about the differences between written and spoken English, than about making 'mistakes'.
In spoken English, the word 'and', unless it is specially emphasised, tends to be just a soft 'n'. The word 'also' might be necessary in many
spoken sentences as well as, along with, plus, 'and'.
I read recently* that spoken English
does have as many rules and conventions as written English, and is just as expressive. We tend to think of spoken English as poorer, less 'correct' or more relaxed because, most of the time, we hear the 'first draft' of speech - with all its corrections and hesitations on display. And also
, historically, spoken English has tended to be analysed in transcript form - missing all the non-verbal language. Of course, that shows it in a bad light.
Written English tends to be thought of as more polished, rule-bound and richer because we usually see the edited, final version only.
*'An Introduction To Applied Linguistics' ed. Norbert Schmitt
