can you tell me what I should include in my colang?
1. Have a look at a thorough language description
, such as a published grammar or a fully-developed conlang
. This will give you ideas for where you could expand you own description.
2. Write a short text in your language.
There's really no better way to come up with aspects which need to be treated in more detail. If you try this, I guarantee you at least one head-slapping moment (i.e. "How could I possibly have forgotten to include that!").