This page applies to both
Fedora 31 and Fedora 31 Games Spin.
This page should also apply to other Fedora 31 Spins and Labs distributions, but I have not tested them.
If you are not familiar with Wine (or maybe even if you are), you may find the article Understanding Wine helpful. A more complete reference is the WineHQ Wine User's Guide. Also see the Wine List of Commands.
All Terminal commands in this document have been validated by copy/paste from this document into a Terminal window and executed. Consider arranging your browser window and your Terminal window side by side in order to copy/paste the Terminal commands.
Start here: Add repository and install Wine
Begin by opening a Terminal window and adding the repository.
$ sudo dnf config-manager --add-repo https://dl.winehq.org/wine-builds/fedora/31/winehq.repo
The next command will install the current stable version of Wine. However, some Windows applications may work better with a more recent development version. If you need or prefer the most recent development version, replace winehq-stable with winehq-devel.
Now, install Wine-Stable.
$ sudo dnf install winehq-stable
Verify the installation succeeded.
$ wine --version
Now that Wine is installed, take a look at the article Using Wine for information on installing Windows applications.
There is also an article CSS HTML Validator installation with Wine which contains specific instructions for installing and configuring CSS HTML Validator.