Did not plan it as such, but trying to convert Perl one-liners to Ruby one-liners led to learning Ruby more than I expected. I tried my hand at translating "Think Python" to "Think Ruby" and by November, I even published a book on Ruby regular expressions.
For next year, I hope to continue learning various tools for text processing
Ah, another translation of "Think Python"! Laurent Rosenfeld originally wanted to translate "Think Python" to French, but then decided to translate it to Perl 6: Think Perl 6 (https://greenteapress.com/wp/think-perl-6/). Which in turn got translated to Spanish by Luis F. Uceta: Piensa en Perl 6 (https://uzluisf.gitlab.io/piensaperl6/). Where will it stop? :-)
For next year, I hope to continue learning various tools for text processing