Blogue should be accepted here as well as blog. It is listed on at least one France-based site as a proper term. https://dict.woxikon.fr/fr-en/blogue. Reported, 7 avril 20
And "publier" which is better than "poster".
I'm not sure that I understand the distinction between "publishing" and "posting" in this context. In either language.
This weird voice on Duo is very irritating!
i tried using "afficher" instead of "poster". does that come off as awkward or just totally wrong in this case?