Page History

...

Therefore it is not necessary to insert two specific keys such as the following into the .properties file of the Contacts app:

contacts-app.actions.commit=save changes
contacts-app.actions.cancel=cancel

...

If a key is to be made available to other modules or apps, make the key less-specific, i.e. shorten it, usually by omitting the <module> or <app> part of the key. See the list below for acceptable shorter forms of i18n keys.
Example: The key for the Teaser component in the MTK module (https://demo.magnolia-cms.com/.magnolia/admincentral;#app:resources:detail;/mtk/templates/components/teaser.yaml) 

mtk.templates.components.teaser=Teaser

...