Undutiful is a really clumsy word to my ears. Dishonourable would seem to fit better in this context.
My computer underlines 'undutiful' in red.
Would using insubordinate here be too specific?
Undutiful doesn't seem like a good translation word choice... maybe disobedient?
is there such a word as undutiful?
Is undutiful even a word?
Yes. It is listed in several dictionaries. I suspect it just is not a very common word these days. Looked at what Google Ngram and it seems like the word was more common before the 1900s.
Merriam-Webster only dives two antonyms for dutiful, disrespectful and undutiful. It gives a bunch of near-antonyms, such as discourteous, rude, uncivil, insolent.
did not accept "unpatriotic" ???
aha that's what decemations are for!