Yes, this is a known error -- see the sticky post in the forums, https://www.duolingo.com/comment/26778885 .
Developers know about this, so there's no need to report missing hints for words starting with an apostrophe. We don't know when this bug will be fixed, unfortunately.
Until that happens, you can: (a) guess what it might mean and then see from the correction afterwards what it means; (b) look up the word elsewhere (e.g. in the boQwI' app, the pojwI' for Windows program, or https://hol.kag.org/ ); or (c) pause your study of Klingon and wait until this and other mistakes have been fixed.
We do appreciate your attempt to be helpful. Of course, we have tried to explain this in the Tips & Notes and on the forum so that we do not have to keep explaining over and over again. However, the way Duolingo is designed, many people do not see the Tips & Notes or the forums until after they have already complained to us. It is not your fault and we understand that. Thank you for trying to be helpful. And now that you know about them, please go read the Tips & Notes and the forums so that you can learn what we already know about and you can focus your efforts on the problems we aren't already working on.
In exercises of translation, you can see the possibles translations for every word.
If you is in a "translation with alternatives*. You can not the translations for every word
If you answer, the system will show you the correct alternative. And you will discover the possible translation for every word of item in future translation's exercises.
The difference can be subtle and using -qu' on a pronoun as verb copula seems odd - I don't believe I've ever seen it. -qu' is used to emphasize the verb. In English we don't have a grammatical way to emphasize something, but one way to do it in writing is with all caps. So one could say paq'e' laD vav "The father reads THE BOOK," or paq laD vav'e' "THE FATHER reads the book," or paq laDqu' vav "The father READS the book." -bej, on the other hand, means that the choice of that verb is certain or definite or without doubt. paq legh neH vav "The father only looks at the book." ghobe'. laDbej. "No. He definitely reads it."
It's not oHbej but 'oHbej with an apostrophe at the beginning. (Ou an't ust eave etters ut :D)
Unfortunately, words that start with an apostrophe can't display hints at the moment -- one of the limitations during this beta phase.
You can learn what words mean by looking them up in an external source or by guessing and then seeing the correction.
In this case, 'oHbej in this sentence means something like "is definitely".
If you just wrote "is", that is not a correct translation.
- torgh 'oH pongDaj'e'. = His name is Torg.
- torgh 'oHbej pongDaj'e'. = His name is definitely Torg.