A year ago, Twitter began testing a feature that would prompt users to pause and reconsider before they replied to a tweet using “harmful” language — meaning language that was abusive, trolling or otherwise offensive in nature. Today, the company says it’s rolling improved versions of these prompts to English-language users on iOS and soon, Android, after adjusting its systems that determine when to send the reminders to better understand when the language being used in the reply is actually harmful.