Quote:For Jules Feller, medieval Belgian authors were not trying to write in their local dialects (Wallon or Picard); rather, they were striving to write in French. However, because they did not have a perfect mastery of the central language, they attempted to deduce or "manufacture" French words by applying logical conversion rules or patterns of resemblance.

The creation of the word octembre is a perfect example of this phenomenon: the human mind spots a regularity in a series of neighboring words (Septembre, Novembre, Décembre) and, through a pure logic of assimilation (analogy), alters the word octobre to align it with the others.

Feller thus categorizes octembre as "false French manufactured by analogy" or part of a "hybrid language"—a form that is neither pure dialect nor correct French, but an artificial creation born out of a well-intentioned (though clumsy) effort to write correctly.