Best practices for deploying multilingual API

Best practices for deploying multilingual API

I have a hobby project and it looks like there is need to have some API
library (which in turn is a wrapper over existing http API) at least for
two languages - JavaScript and Python, adding support to Perl would be
nice as well.
The question is - what are the best practices for minifying the cost of
supporting and developing of such multilanguage APIs? Is it better to
choose one language and write just wrappers that for other ones? Or it's
better do move slower but to implement thoroughly each method on each
language.