"Katten min er et alvorlig dyr."

Translation: My cat is a serious animal.

[Hugo-Molina]

This is something important to say

[hrclbm]

For example when you are formally introducing the cat to an undiscerning prankster

[otsogutxi]

This is what a cat owner says when someone comes to their house:)

[Queen_of_Antiva]

My cat means business

[LaurentMontesi]

More seriously, is there a reason why alvorlig doesn't have a "t" (alvorligt)

[asteconn]

IIRC, adjectives ending in -ig don't add t to the end.

[Tetraoxid]

I call him Sam

[Andrew_Leif]

Why so serious?

[19Paris19]

it's not a phase

[hmada993]

Mer som katten min er et gretten dyr.

[Gidget84]

et grettent* dyr

[sonoluigi]

Og hun leser alvorlige bøker.

[MannuBeyHive]

Why not alvorligt?

[G36CGH]

Adjectives ending in '-lig' do not ever receive 't'.

[NorskSpiller]

Hm I've heard plenty of Norwegians say "serious" but with an accent is this another word or are they just using english because they can.

[Deliciae]

"Seriøs" is a Norwegian word, yes.

[TheAmazingGoat]

Alle kattene er alvorlige dyr