You could use what bazarr uses: https://github.com/morpheus65535/bazarr (or use bazarr to enrich the media before playing)
Whether these have Kodi addons i'm not sure, but I'm sure there might be other alternatives.
Supported subtitles providers:
Addic7ed
Argenteam
Assrt
BetaSeries
BSplayer
Embedded Subtitles
Gestdown.info
GreekSubtitles
HDBits.org
Hosszupuska
LegendasDivx
Karagarga.in
Ktuvit (Get hashed_password using method described here)
Napiprojekt
Napisy24
Nekur
OpenSubtitles.org
Podnapisi
RegieLive
Sous-Titres.eu
Subdivx
subf2m.co
Subs.sab.bz
Subs4Free
Subs4Series
Subscene
Subscenter
Subsunacs.net
SubSynchro
Subtitrari-noi.ro
subtitri.id.lv
Subtitulamos.tv
Sucha
Supersubtitles
Titlovi
Titrari.ro
Titulky.com
TuSubtitulo
TVSubtitles
Whisper (requires ahmetoner/whisper-asr-webservice)
Wizdom
XSubs
Yavka.net
YIFY Subtitles
Zimuku
On the side note of ML nonsense. If you have a graphics card with at least 4GB of vRAM using Whisper to auto generate with the latest Large model will produce pretty amazing results. Even when people mumble or have thick accents.