Search ui.components.logbook.messages.is_closed

hello,

in some plugin, with cover, the label ui.components.logbook.messages.was_closed is used , but the right one should be ui.components.logbook.messages.“is_closed”

the first one display “was closed” and the state to display should be “is closed”

to change the label in the plugin , we need to know if that label exists or if it’s wth another syntax , the one with ui.components.logbook.messages.was_closed exist

where i could find the answer or who is aware if the label for state “is closed” is the good label ?