It seems to me that Ola problem is pretty related to another topic awaiting Kirby 2.5 to be solved. Once it’s solved, there will be no need for hacks. Ola would be able to use the same structure for all langauges, benefits from all nice language features, and filter menu/contents by language as it was possible before Kirby 2.3. What is not translated will be ignored in other languages.
The actual problem is that Kirby requieres the default language .txt file to be present in each page’s folder to work correctly. Free us from this constraint, and everything would become easy.