All of our commands have been using translation keys, such as t('cortex.ability_set'), so we’ll need to create a locale file to convert those keys to actual string values.
Locale files need to live in the locales folder under your plugin folder. They need to be named locale_<language code>.yml. ‘en’ is the language code for English.
Locale files use YAML format just like configuration files. Each plugin has its own top-level locale section. For example:
en:
cortex:
attributes_title: "Attributes"
ability_set: "Ability set!"