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infra/HowToAddANewLanguage.md

@@ -51,6 +51,7 @@ Notes:
 - Use option `--clone` if the language repo is created in another dir than the
   existing language repositories.
 - Use option `-u`/`--use-https` to use the `https` protocol instead of `ssh`
+- skip the `-p`/`--public` option if you want the repo to be private
 
 The `-d` option should point to the **_parent_** dir of the target — it makes it possible to add multiple language repos at a time, assuming they are all located within the same parent directory. The `--clone` option makes sure that the new repo/s is/are directly cloned and made part of the local GiellaLT repos.
 The regex is presently required, but will probably be made optional.