GLib.KeyFile.prototype.set_locale_string

function set_locale_string(group_name: String, key: String, locale: String, string: String): void {
    // Gjs wrapper for g_key_file_set_locale_string()
}

Associates a string value for key and locale under group_name. If the translation for key cannot be found then it is created.

Since 2.6

group_name: a group name
key: a key
locale: a locale identifier
string: a string