"How many times do we need to repair the robot?"
Translation:'arlogh qoq wItI'nIS?
Shouldn't I put the a' on 'arlogh because it's a question? In fact, the hints say I should.
The hints are generated based on many different uses and can't be relied on to tell you only the usage in the current sentence. The -'a' suffix turns what would otherwise be a statement of fact into a yes/no question. All other types of questions in Klingon do NOT use the -'a' suffix. Since 'arlogh is asking for a number rather than "yes" or "no", the sentence does not use the interrogative suffix -'a'.