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

Line of Duty
Is Line of Duty difficult to watch in English? Explore its vocabulary difficulty, estimated English level, and unfamiliar words before watching.
Unique vocabulary and phrases by level
How difficult is Line of Duty in English?
Line of Duty: 31.0% A1–A2 vocabulary; 35.6% B2, C1, and rare vocabulary. Vocabulary size: 6,718.
Unique vocabulary
- For A2 learners: 50.0% of unique vocabulary is above A2 or marked rare. Expect substantial preparation; start with short scenes and English subtitles.
- For B1 learners: 35.6% of unique vocabulary is above B1 or marked rare. Expect substantial preparation; start with short scenes and English subtitles.
- For B2 learners: 27.8% of unique vocabulary is above B2 or marked rare. Expect substantial preparation; start with short scenes and English subtitles.
18.9% Unclassified. Unclassified vocabulary has no reliable level assignment.
Vocabulary weighted by word occurrences
87.5% A1–A2 vocabulary; 4.9% B2, C1, and rare vocabulary; 2.9% Unclassified.
This counts repeated eligible words. Phrases are excluded from this calculation to avoid counting their component words twice.
Subtitle coverage: 36 of 42 episodes; the profile describes only available subtitles.
Recurring words and phrases to preview
- evidence (B2): 460 occurrences in available subtitles.
Subtitle example:
to gather all relevant evidence and statements.
- suspect (B1): 258 occurrences in available subtitles.
Subtitle example:
And that makes you prime suspect. Mr Duke had nothing to do
- witness (B1): 242 occurrences in available subtitles.
Subtitle example:
to witness the meeting with Mallick. True.
- operation (B1): 239 occurrences in available subtitles.
Subtitle example:
Then I'll get our community policing operations
- image (B1): 214 occurrences in available subtitles.
Subtitle example:
For the tape, the images show DS Arnott returning
Compare with titles in similar genres
- Black Mirror: 35.8% B2, C1, and rare vocabulary (0.2 percentage points more than Line of Duty).
- Mindhunter: 34.9% B2, C1, and rare vocabulary (0.7 percentage points less than Line of Duty).
- Twin Peaks: 33.2% B2, C1, and rare vocabulary (2.4 percentage points less than Line of Duty).
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: