Hello, I was reading the webpage of Institut d'Estudis Occitans dau Lemosin and I've realised that I just can understand all of it. I am from a region that speaks officialy one dialect of Catalan, a same family but different "language" of occitan. Even being for centuries evolutioning separadtely this occitan from Limoges from Catalan from Valencia and being the first one strongly influenced by French and Catalan from Valencia by Spanish. And in addition of that considering that both of them have not had any official grammar or official status for centuries, today I can read Lemousin not dificulty. So I wonder... When is it considered that a language (or two languages) are the same, are dialects or different languages?. I mean. Appart from nacionalistic, politic and historic reasons, Is there in romanistic objective criteria in order to considering when one thing is a language or dialect?