ON LANGUAGE AND LANGUAGES

Dear Followers ( In particular, but not exclusively)  for my CPE sweeties:

Could you research  the following  : The difference between language and dialect  What did Ferdinand de Saussure say about this ? Provide 3 definitions of Language. What is different  for a first language learner from a second language learner ?  How was it for you ? Bring the answers to these questions  and we will discuss these interesting  topics. Pat