Is capitalization completely forbidden in Klingon, or can some exceptions be made? For example, if I decided to start writing every sentence in Klingon capitalized, would I be making a grave mistake?
First, it can make the use of Q and q very confusing. They are completely different letters with different pronunciations and using the wrong one can lead to misunderstandings.
Second, some of the dialects use other versions of the letters and people may think you are trying to write in dialect. For instance, one of the dialects use N for it's pronunciation variant and another uses h for it's pronunciation variant.
tHirD, OncE YOu aRe usED tO A pARticUlaR cApiTaLIzaTioN, haVIng tO rEAd a difFeRenT caPItAliZatiOn iS veRy anNoYinG.