It's petty of me I know. But the whole idea of peeps referring to Superman as "Kal" is like a pebble in my shoe.
I'm not sure when it started. At least as recently as 20 years ago (oh phooey, did I really just call A Whole Generation Back "recently"?) , if Clark got called by his Birth Name, it was "Kal-el".
Now I know we're a First Name Society here West of The Urals. But seriously, this is ridiculous!
Yes, his daddy's name also ended in "-el". And yes, writers have made "House of El" A Thing.
That does not mean super-advanced space-alien names and customs work like ours. Make it alien.
Kal-el. Period.
<end rant>