Sorry to ask for further corrections here, but our [style guide](http://ellislab.com/codeigniter/user-guide/general/styleguide.html#whitespace) says that you need to use tabs for indentation. You've used spaces here and you can see here that the diff looks weirdly aligned.
Also, after the change from 's' to 'seconds' (good idea on the language translation :+1:), it should be preceeded by a space. :)

The rest of it seems good.