It is possible to run a game with DX12 on Windows 7 - for example World of Warcraft can do this, but it has to be specifically implemented for each game, as it isn't an universal feature, as it is in Windows 10.
Sadly beside not being readily available for developers it also brings a subset of DX12 features only. Also the engine currently uses other API functions not available in Windows 7.
It's planned to add an italian language ??
Planned? No. I think predetermined is the right word :-)
It's nearly complete too.
Progress is discussed here: https://forums.thimbleweedpark.com/t/delores-italian-translation/4303
And patches are being applied to the game: https://github.com/grumpygamer/DeloresDev
See "Directions" if you want to try the dev version (basically you have to download the Delores engine + the Delores game + set the path in a config file).