I have this game on PC but I cancelled the subscription a while ago. Would I get a free month if I bought the game for PS4?
Yes, you would. For each version of the game you purchase and add to a Square-Enix account, you get 30 free days. You can only add each version once. This means it's possible to get a maximum of 90 days if you purchase and add a PC, a PS3, and a PS4 copy.
Also...how is communicating in the PS4 without a keyboard? Sounds difficult.
Not as bad as you'd think, but it's still pretty awful enough that you'd want to get yourself a keyboard.
Also I think we can all agree on the one universal truth that Lalafells are adorable, yes?