Are you willing to provide a fix?

The current slugify is defined here:

• PyTrakt/trakt/utils.py

  Lines 10 to 20 in 8a6d4f1

  	def slugify(value):
  	"""Converts to lowercase, removes non-word characters (alphanumerics and
  	underscores) and converts spaces to hyphens. Also strips leading and
  	trailing whitespace.
  	Adapted from django.utils.text.slugify
  	"""
  	nfkd_form = unicodedata.normalize('NFKD', value)
  	decoded = nfkd_form.encode('ascii', 'ignore').decode('utf-8')
  	value = re.sub(r'[^\w\s-]', ' ', decoded).strip().lower()
  	return re.sub(r'[-\s]+', '-', value)

Hi, I added the backticks for readability but I'm sorry but I won't be able to provide any fix.
I only used a workaround to bypass the issue on PlexTraktSync.

@typhoe are you able to find trakt.tv official docs or description how they slugify? perhaps ask their support?

No sorry.

I only posted my issue here because one of the dev from PlexTraktSync told me the issue seemed to be from the slugify() function :
Taxel/PlexTraktSync#615 (comment)
and asked me to post here :
Taxel/PlexTraktSync#615 (comment)

I asked on the Trakt ticket support but that could take a while ;-)
https://support.trakt.tv/support/tickets/10789

Hi,

Justin of Trakt support answered me, I'll copy/paste their answer below:

The rules would be defined in https://github.com/norman/friendly_id/ but in general I'd recommend using IDs to match and not relying on a slug. If you know the Trakt ID, ​that can be used in the URL or you use some of the lookup functionality we have like this:

https://trakt.docs.apiary.io/#reference/search/id-lookup/get-id-lookup-results
https://trakt.docs.apiary.io/#introduction/website-media-links

I'd highly recommend using IDs since Trakt could have different titles (and thus different slugs) compared to TMDB or TVDB.