"But he is not an expert!"

Translation: On ale není odborník!

[tompw89]

Is the pronoun "on" compulsory here?

[sjpet]

I wonder that too

[venik212]

Me too-- my sentence was marked as being wrong without ON ar the beginning.

[BoneheadBass]

There are some accepted translations that do not place on at the beginning of the sentence. But we have no current report for such a sentence, so we can't see exactly what you wrote. Please use the Report button, even if you also comment.

[venik212]

Sorry-- my translation was: Ale neni odbornik!

[VladaFu]

Currently all accepted forms contain "on" somewhere but in this case it can be acceptable without it we were already talking about him. I will allow it.