Explore Movie Vocabulary
Learn English with movies. Discover how much of a movie’s vocabulary you already know and review unfamiliar words before watching.

K-PAX
Unique vocabulary and phrases by level
How difficult is K-PAX in English?
K-PAX: 63.8% A1–A2 vocabulary; 16.2% B2, C1, and rare vocabulary. Vocabulary size: 1,491.
Unique vocabulary
- For A2 learners: 26.8% of unique vocabulary is above A2 or marked rare. Expect substantial preparation; start with short scenes and English subtitles.
- For B1 learners: 16.2% of unique vocabulary is above B1 or marked rare. Preview recurring words and use English subtitles.
- For B2 learners: 10.5% of unique vocabulary is above B2 or marked rare. Preview recurring words and use English subtitles.
9.4% Unclassified. Unclassified vocabulary has no reliable level assignment.
Vocabulary weighted by word occurrences
91.6% A1–A2 vocabulary; 3.7% B2, C1, and rare vocabulary; 2.0% Unclassified.
This counts repeated eligible words. Phrases are excluded from this calculation to avoid counting their component words twice.
Recurring words and phrases to preview
- planet (B1): 25 occurrences in available subtitles.
Subtitle example:
It’s just that I'm only familiar with nine planets.
- patient (B1): 19 occurrences in available subtitles.
Subtitle example:
And to top it off, the city is dumping patients on us.
- constellation (rare): 7 occurrences in available subtitles.
Subtitle example:
Do you know all the constellations?
- cure (B1): 7 occurrences in available subtitles.
Subtitle example:
It's quite another to make them think that you can cure them.
- alert (C1): 5 occurrences in available subtitles.
Subtitle example:
Four. You're feeling more alert.
Compare with titles in similar genres
- Donnie Darko: 16.1% B2, C1, and rare vocabulary (0.0 percentage points less than K-PAX).
- Cube Zero: 16.6% B2, C1, and rare vocabulary (0.4 percentage points more than K-PAX).
- Rememory: 15.7% B2, C1, and rare vocabulary (0.5 percentage points less than K-PAX).
These percentages describe vocabulary, not the proportion of dialogue you will understand. CEFR labels are estimates, not official film ratings. Accent, speed, songs, context, and your own vocabulary also affect comprehension. Repeated occurrences may include repeated dialogue or lyrics.
How we estimate vocabulary difficulty · Evidence generated: