A friend who deals in things electronic was speaking to some clients in Paris recently, there was an ad hoc component, he explained to this particular tool, meaning one specifically designed for the purpose.
His Parisian client was silent and obviously mystified.
‘Why?’ he demanded ‘does it come with a fish’.
Monsieur had of course heard ‘addock, or as we say it haddock, a word the French use for smoked haddock (unsmoked being églefin ).

This in turn reminded me of a time when one of my sisters was au pairing in the Charante district.
I appeared to her that all of France came to her and said ‘Ah, you are Irish- N.S.E. !’
What these mysterious letters meant or how she was supposed to react was totally beyond her.
Eventually the code was cracked.
The French were merely acknowledging that the premier maker of Cognac, which was made in that region, was of Irish stock- Monsieur Hennessy, or as they said N.S.E.

Thus we can see that we can get lost in translation without translating anything.