Change language of a timestamp template sensor

[Didgeridrew]

Day and month does not follow locale setting

Hello, In a markdown card I’ve got: {{ as_timestamp(state_attr('automation.dz_584', 'last_triggered')) | timestamp_custom('%A %d %B %Y à %-H:%M') }} Despite the user’s locale is set to french, day and month are displayed in english. Shouldn’it follow the locale setting? Is there a known workaround? Thank you