Problem with translating single words

I’m using rtMedia with the german language files. But somehow there is still english text showing up, e.g. in the buddypress notifications tab:

“…gefällt photo” instead of “…gefällt dein Foto”

But I just can’t find the word “photo” in the language files?

And where can I rename the “wall posts” album?


I got the same problem with my german site. There are no files to translate the plugin.