Presentation
This translation of French version of October 19, 2022, takes into account my latest work on multi- and pluri-methodological modes of variation. The different epistemological types of coherence currently available are now four: "closed coherence", "open coherence", "multiple coherences", "plural coherence" and "virtual coherence".
A "complex didactics of languages and cultures" (cf. my 2003b manifesto article) must be able to take into account in its analyses, and to mobilize in its proposals, the totality of these modes of coherence.