You can install them without problem.
If you have priiloader, you can patch the system menu to be region free, or any other methods to patch/launch region free channels, like GeckoOS.
If launching them is a problem (not working, wrong video mode, etc.), then you can use a game loader to load your channel.
for example USBloaderGX list all your installed channels and let you launch them, whatever the region. additionally, You can patch the video, the language, add cheatcodes, etc.