Better tracking of untranslated terms in per-language terms vocabulary

Hi,

that was good idea to display the language on terms listing page, but still it seems like ergonomy may be enchanced further.
I have big multilingual vocabulary with hundreds of terms.
Ability to see which terms don't have translations would help me a lot but I can't find a way how to do it without altering the module code. Views don't support translations for taxonomy terms and I wasn't able to find how to override the call to i18ntaxonomy_translation_overview to implement it in my template.php.

For now I just display untranslated terms on 'Translation' page where normally only translations are displayed. I've patched i18ntaxonomy_translation_overview for that but I would appreciate any advise on how to do it via template.php or maybe this functionality might be included in the module.

Thanks,
Serge