Hello. I've got a question. How to call global language definitions from extension?
You can access only english (english.xml) block globally.
This is done by accessing language object
$this->language->get('text_key')
This is if you are inside controller extended class.
Other languages modules you can load with
$this->loadLanguage('section/file');
After you load you can call same above get() method to get new loaded text_keys.