Why does the combination fn+⌘+delete doesn't work? As a new user of MacOS - coming from the Windows world -, I'm trying to quickly learn how the Delete key works here and what are the possible combinations with other keys.

However, while listed in this article (recent, Oct. 2016): https://medium.com/productivity-freak/macos-keyboard-shortcuts-41c8184f65a6 the combination fn + ⌘ + delete doesn't seem to work. I tested in Notes, as well as Google Chrome (I thought at first it was a bug in Chrome).

I'm using macOS Sierra 10.12.5 (16F73) with an AZERTY keyboard (French layout).
I don't know why it gives that shortcut, but try control-k.

See https://support.apple.com/en-au/HT201236