Option A: Gemini Notebook: cited terms, then the glossary
Best when: You need term extraction traced to the lesson
What it does: Gemini Notebook extracts and drafts; you check every term
Strong at: Each extracted term cites its lesson line
Limit: 80+ languages claim does not name Cantonese; teacher checks every translation
Free plan: Yes, limited (notebook and source caps)
Option B: Claude: drafts the glossary, back-translates in a fresh chat
Best when: You want a second look at each translation
What it does: Claude drafts and back-translates; a teacher corrects
Strong at: Back-translation exposes meaning drift
Limit: A separate chat does not prove accuracy
Free plan: Yes, limited (5-hour and weekly usage caps)
Option C: ChatGPT: lists terms and formats; you translate
Best when: You write the translations personally
What it does: You translate; ChatGPT extracts and formats
Strong at: No machine translation at all
Limit: You write every equivalent yourself
Free plan: Yes, limited (uploads and data analysis)