The translation function is not used consistently throughout SimpleTest. In some places strings are automatically translated, but not in others.
- assert*([conditions], $message = "%s") - $message
- get_info - values in returned array
- drupalPost($path, $edit = array(), $submit) - $submit
- clickLink($label, $index = 0) - $label
There may be other areas that I haven't listed, but we need to come to a consensus on how this should be done.