I've found a solution by myself.
In the Joomla folder go to administrator/components/com_scriptcodehighlighter/models/forms
and open the file scriptcodehighlighter.xml
. There's the list of all supported formats.
Then add following options:
<option value="sql">SQL</option>
<option value="powershell">POWERSHELL</option>
Just for be sure, I've followed the alphabetical order of the file, so I've put them in right positions (but I don't know if it's has any importance).
Do the same thing for the file /components/com_scriptcodehighlighter/models/forms/scriptcodehighlighter.xml
.
Now when I add the code in the dropdown list I can see missing languages, and they also work correctly in article.