The dragon language has no forms of punctuation. Use line breaks or conjunctions like "and" to separate phrases or sentences.

Actually, there is one single punctuation mark in the entire known canon. The first wall of Become Ethereal contains a character that resembles a hyphen or a stretched-out diamond. It precedes a quotation. Unfortunately the character is not part of our dragonscript font.

I believe that there is non-canon punctuation. But there is no official punctuation. Spacing and paragraphs is the way to separate words and sentences (and obvioulsy paragraphs).

The language is designed to be simple... Not many exceptions to the rules. There exist words with apostrophes within them, such as Zu'um or Thu'um. It all depends on the pronunciation, and the meaning of  the word. You should skim through some of the Dictionary and/or the Memrise Courses. You'll see all the punctuation in words are usually IN the words, as far as I've seen. But English punctuation signalling the beginning and end of a sentence or thought is normal.