Rather than persistently attempting to sanitize a phrase, the keyboard will learn to go with the flow and predict a swear word once it's been typed a few times.
"Swear words filter: ducking duck no more! After you type out the word a few times, the keyboard will learn it and start predicting it when you tap or swipe," Microsoft says.
The update also irons out a few glitches related to iOS 10 and introduces a new option to create new themes and key borders.
This update is the first to Word Flow since Microsoft released version 2.0 of the word-predicting keyboard in August, just four months after releasing version 1.0 with its arc-shaped keyboard for easier one-handed typing.
The update added new options to use Bing to search for the web as well as animated GIFs, contacts and images.
Word Flow comes from the experimental Microsoft Garage lab and was developed by teams in Microsoft Research and Bing. Although it's been around for a nearly half a year, the keyboard app is still limited to iPhones and iPads connected to the US App Store and only supports English.
The rapid move to version 2.0 appeared to be a response to Google's Gboard gesture-based keyboard, which arrived just ahead of it with support for multiple languages and was available globally from the outset. Google's keyboard, of course, integrates search and offers emoji, text, and GIF suggestions.