I have now compiled language for orca groups forum, this is how I did it,

If you navigate in your browser to www.dolphinurl/groups/orca/ you may not see the option to compile language.

I went to: www.myurl/groups/orca/BxLang.php you will get a blank page

go back in the browser and navigate again to: www.dolphinurl/groups/orca and the option is there.

It worked for me..