While the game itself isn't free, you can technically play without owning it if:
These sites often bundle malware, adware, or viruses with the "game" files. Use Your Words Free Download
Write your own subtitles for a clip from a foreign film. While the game itself isn't free, you can
Fill in the blank for a strange news headline. Extra, Extra!: Write a caption for a bizarre photo. While the game itself isn't free
You can join games hosted by streamers on platforms like Twitch or YouTube by typing the room code shown on their screen into your phone.
Only one person needs to own and host the game. Up to 6 players can join for free using their mobile devices, and others can join the "audience" to vote.