Eurail - https://www.eurail.com/

French Rails - https://frenchrails.com/en

German - https://bahn.de

Google Translate - https://translate.google.com/?sl=auto&tl=en&op=translate

Grok - https://x.com/i/grok?conversation=2020558933849473518

Night trains - https://www.nightjet.com/en/#/home

Notre Dame - https://www.notredamedeparis.fr/en/ - free but need reservation. 45 minutes

Paris Metro - https://www.iledefrance-mobilites.fr/en