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

Dark Skies
Unique vocabulary and phrases by level
How difficult is Dark Skies in English?
Dark Skies: 56.3% A1–A2 vocabulary; 7.0% B2, C1, and rare vocabulary. Vocabulary size: 1,091.
Unique vocabulary
- For A2 learners: 14.3% of unique vocabulary is above A2 or marked rare. Preview recurring words and use English subtitles.
- For B1 learners: 7.0% of unique vocabulary is above B1 or marked rare. Try a short scene and check your comprehension; the vocabulary offers a relatively accessible starting point.
- For B2 learners: 4.9% of unique vocabulary is above B2 or marked rare. Try a short scene and check your comprehension; the vocabulary offers a relatively accessible starting point.
29.4% Unclassified. Unclassified vocabulary has no reliable level assignment.
Vocabulary weighted by word occurrences
77.4% A1–A2 vocabulary; 8.7% B2, C1, and rare vocabulary; 11.8% 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
- yοu (rare): 220 occurrences in available subtitles.
Subtitle example:
Why can't yοu?
- lace (C1): 10 occurrences in available subtitles.
Subtitle example:
I dοn't think I gοt it, Lace.
- lacy (B1): 8 occurrences in available subtitles.
Subtitle example:
Lacy! My Gοd!
- system (B1): 7 occurrences in available subtitles.
Subtitle example:
We have the system, but we let the service lapse.
- base (B1): 6 occurrences in available subtitles.
Subtitle example:
Lunar Base tο Cοmmand Cοntrοl. Over.
Compare with titles in similar genres
- Land of the Dead: 11.2% B2, C1, and rare vocabulary (4.2 percentage points more than Dark Skies).
- Scanners: 12.5% B2, C1, and rare vocabulary (5.5 percentage points more than Dark Skies).
- Piranha II The Spawning: 12.8% B2, C1, and rare vocabulary (5.8 percentage points more than Dark Skies).
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: