What is the polite way to say I don't know?
I am often approached in Czech on public transportation. I want people to know I am trying to learn but I can't speak. What can I say?

Question

Answer

Promiňte, (ještě) neumím moc dobře česky - I am sorry, I don't speak Czech very well (yet).

Promiňte, učím se česky, ale ještě nemluvím. - I am sorry, I am learning Czech but I don't speak yet.

Já rozumím česky jen trochu/trošku - I understand Czech just a little bit.

Omlouvám se, ale (to) nevím - I am sorry, but I don't know (that).

To bohužel nevím - Unfortunately I don't know that.

Answer

you can say : sorry there's a something that you should know please don't panic everything is going to be OK , I'm afraid I can't give you the information you seek , please accept my great apologies
:)     :)     :)    ;)