Any chance to specify locale code?

Hi there,

I’ve been testing audiblez and so far it’s really nice — great work!

However, I’ve run into a small issue: I’m Spanish, and I’d like to be able to convert books using Castilian Spanish rather than Latin American Spanish.

According to the help, it says:

example:
  audiblez book.epub -l en-us -v af_sky

But it seems that the -l parameter doesn’t actually exist:

# audiblez book.epub -l es-es -v ef_dora
usage: audiblez [-h] [-v VOICE] [-p] [-s SPEED] [-c] [-o FOLDER] epub_file_path
audiblez: error: unrecognized arguments: -l es-es

Maybe the documentation/help is outdated, or am I missing something?

Regards.