How to use :learn with the translated texts in other languages

[g4570n]

Hello, the translations in other languages are available in the learnxinyminutes-docs repository.

For example, AWK:

en: https://github.com/adambard/learnxinyminutes-docs/blob/master/awk.html.markdown es: https://github.com/adambard/learnxinyminutes-docs/blob/master/es-es/awk-es.html.markdown

If I use the following command, I get the English version by default:

curl cht.sh/awk/:learn

How can I choose to see the translation in another language, in this case Spanish?