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perlfan
It might require some <i>unlearning</i> or <b>deprogramming</b>. I've had success in the past with someone experienced in another language, and just going through with them in a manner that has them come up with a programming task (or <i>idiom</i>.) in the their strong language; then showing them the Perl <i>idiom</i>. General concepts about dynamic languages in your case sounds like it should not be a barrier. This relies on them being proficient with another language (here Python); and the stronger the better.
<p>
Another thing that comes to mind that might be helpful is, [https://rosettacode.org/wiki/Rosetta_Code|Rosetta Code].
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