Whts n grmr?

Mst f t ppl I txt,use tis  language tht s shrt n smpl,bt then I've difficulty n undrstndng it.I was told that grammar is very important for any language,so is the spelling,and so is the phonetics.I even remember struggling with the stress and strain exercises during my English classes,we had to buy Wren and Martin book(which wasn't a part of our syllabus) to improve our grammar and vocabulary.Those days, I never understood what grammar or vocabulary was,and I don't think I still know completely.My English teachers were so keen on grammar exercises,and it was hard to impress them with the subject alone,they wanted grammar,punctuations.The worst part was,my class teacher was an English teacher,and submitting a leave letter was the most difficult assignment,he would look for the missing coma,fullstop,with an exceptional eye for your's and yours.One friend of mine told me about her friend saying caspicum for capsicum,and from then on I've been having difficulty to say capsicum,because caspicum comes to my mind.And the same friend pointed that I say flug for plug and only then did I notice that so many people around me say flug.Language is just a tool for communication,where the other person understands the message,so no grammar is important,but then as is difference between a gross work and a fine work so is the difference between a language and grammatically correct language.I think G.B.Shaw once said,show me your books and I'll tell who you are,the same way show someone your writing,it will say how well educated you are.I'm not an English teacher to be speaking about this,but the txt msgs frm ma bros gave me these thoughts.When I tell my brother about this,he says " v r gen y".