"Auto mého táty je rychlejší."

Translation: My dad's car is faster.

[Sammka]

Why not 'my father's car is faster'?

[kacenka9]

I believe that it is because FATHER is more formal and equals OTEC in Czech.

Auto mého otce je rychlejší.

[JamesTWils]

And yet, sadly, I do not recall being introduced to either otec or the word for mother. I would suggest that the standard word for the relationship should always be accepted. I suppose, though, that you could include dad, pa, da, poppa, daddy, and every other less formal term for the word father.

[Sammka]

Makes sense - It's just a bit confusing because in other parts of Duolingo they seem to treat those words interchangeably.

[butterfly604479]

I put "my father's car is quicker" and was marked wrong. I was assuming that was because of faster/quicker, but reading here maybe it's because of father/dad. Either way I object! Duolingo has been accepting mother/father for mama/tata in all these questions so far so why not here, if the problem is that? And if it's faster/quicker then there's nothing wrong with quicker. Have requested that my answer be accepted.

[VladaFu]

Quicker is accepted.

[butterfly604479]

Okay - tried an experiment and I see that the father/dad thing was the issue... but I've definitely used father in some translations of tata in this Family section so far and not been penalised.

[VladaFu]

The point is to show that táta and otec is not the same. Neither is dad and father. I am not aware of the sentences you are talking about.

Táta is introduced in Family 2. In Family 1 no sentence allows táta. If you think otherwise you would have to point to such sentence so that we could find out what is happening.