Will Francophones Understand One Anothers Dialect?
Will a Belgian understand a French text that uses “quatre-vingt-dix” instead of “nonante”? Absolument! Will he realize that a Belgian did not write the text? Of course! For an instruction manual, that makes no difference. For an advertisement directed at him personally, the language variant might. If you are marketing to a specific target, one should retain the services of a French translator, who understands that target’s language.