Dear bro, speaking national language is a privilege and we should be proud about it but since we learn English in our schools, we should be rather good at it. If you read my posts, I rarely use difficult terms or words and keep the construction my sentences very simple so that more and more members can understand my posts easily.
But if a person can't understand such simple posts then there is no other option but to think that person either lacks the basic knowledge of the English language or is suffering from the comprehension issues..