Topic on User talk:Andytizer
You just reminded me about categories, so I've added Category:Articles with translations and [[:{{{language name}}} translations]] to the relevant parts of the template.
Regarding category pages... hmm, the template looks for subpages of the article it's in, so if you put {{Langbar|main}} in Category:Games, the template will show the link to the Polish version of the category page. I could amend the template to categorise Polish (etc.) translations in Category:Games/Polski, which would achieve what I think you're after?