After busting my proverbial balls trying to figure out why ORCA stubbornly refuses to compile additional languages (especially on additional templates) I've come up with the needed steps to flawlessly and efficiently compile any language on any template.
Preparation: If you have tried unsuccessfully to compile languages on new templates, then before following this guide, go to your dolphin installation and in the folder modules/boonex/forum/classes delete all the folders you'll find in there (like "en"). BE CAREFUL not to delete the .php files in that folder. Then go to modules/boonex/forum/layout and delete all the folders that end in "_xx" (where xx is the two letter code for the language, for example "base_en", "uni_en", "mytemplate_en"). The only folders that should be there prior to following the guide are "base" and "uni".
1) Make sure you have all folder permissions set correctly as per Dolphin Installation Instructions
2) Head over to your Dolphin installation folder and from there on go to modules/boonex/forum/install/langs/
3) Create a copy of en.php and save it as xx.php where xx stands for the two letter code corresponding to your language (i.e. es.php for spanish, it.php for italian, de.php for german etc..)
4) Translate the file to your language, and save it as UTF-8
5) Now go to the folder /modules/boonex/forums/integrations/base/langs/ (yes there are two language files!)
6) Repeat steps 3 and 4
* Repeat steps 2 to 6 for any additional language you might want to install
This concludes the additional languages installation. You can go to your forum page, logged in as administrator, and on the top right of the forums table select the "Compile Languages" button for each corresponding language you have created. This will only work for the UNI template. If you want to compile the languages for additional templates follow the next steps:
7) Go to the folder /modules/boonex/forum/layout
8) Create a copy of the "uni" folder, but name it with the name of the template you want to compile languages for (for example "mytemplate")
9) Go inside the newly created folder and edit the file "params.php"
10) Locate in the file (should be easy, as the file is 4 lines long) the parts uni/xsl/ (should be 2 of them) and uni/css/ and change the "uni" part with the name of your template (for example "mytemplate/xsl" and "mytemplate/css")
11) Save the file and upload all the new files to the server (if you are not locally working on the server already)
* Repeat steps 8 to 11 for every additional template you might want to install
Now just switch to the desired template, go to the forum index logged in as administrator and use the links there to compile the languages for that particular template.
Hope this helps =)