translation.member_unknown: A language file words something that is no message, enum or email

A language file words something that is no message, enum or email.

Area 10, Configuration; not declinable; the next step is usually the agent's.

A member of translations { } words one message, enum or email of the folder's scope, by its name in lower_snake_case.

example

translations {    order_shipped: "La commande de {name} a été expédiée."    order_cancelled: "La commande est annulée."}

jadpo checkcheck failed: 1 error, 4 files

error order_cancelled words nothing

--> domains/shipping/translations/fr_fr.jadpo:3:5

  |3 |     order_cancelled: "La commande est annulée."  |     ^^^^^^^^^^^^^^^ no such message, enum or email

reason: A member of translations { } words one message, enum or email of this folder's scope, by its name in lower_snake_case, or a failure by its code. order_cancelled is none of them; the scope has order_shipped.
next: Remove order_cancelled from domains/shipping/translations/fr_fr.jadpo, or declare the message it words beside the language files (agent)
rule: translation.member_unknown
help: https://jadpo.dev/docs/errors/translation.member_unknown