using google translation to German gives "meine Cousine und ihre Frau".. as you cited it might work just because English/German are close languages..
But, yeah, DL is just a fancy (and incomplete) mapping.
Use that term to down play the effectiveness of the approach seems quite surprising. Consider human needs years of study to do the same thing, which usually also makes mistakes.
Even for the example, without much analysis, it's very easy to miss the part.
In this case the context dependence part wasn't up to par, so it was just fancy mapping.