Chain Reaction

How difficult is Chain Reaction in English?

Chain Reaction: 63.9% A1–A2 vocabulary; 14.6% B2, C1, and rare vocabulary. Vocabulary size: 1,192.

Unique vocabulary

• For A2 learners: 26.4% of unique vocabulary is above A2 or marked rare. Expect substantial preparation; start with short scenes and English subtitles.
• For B1 learners: 14.6% of unique vocabulary is above B1 or marked rare. Preview recurring words and use English subtitles.
• For B2 learners: 8.7% 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.

9.7% Unclassified. Unclassified vocabulary has no reliable level assignment.

Vocabulary weighted by word occurrences

89.7% A1–A2 vocabulary; 4.3% B2, C1, and rare vocabulary; 2.7% 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

• cop (B2): 8 occurrences in available subtitles.

  English meaning: An informal word for a police officer.

  Subtitle example: We're being set up. I'm not going to the cops until I know more.

• foundation (C1): 8 occurrences in available subtitles.

  Subtitle example: Who's on the board of your foundation?

• hell (C1): 8 occurrences in available subtitles.

  English meaning: A place of suffering in some religious beliefs; also used informally to express anger or surprise.

  Subtitle example: He left college for disciplinary reasons. He blew the hell out of the lab.

• hydrogen (C1): 8 occurrences in available subtitles.

  Subtitle example: Water. H2O. Two parts hydrogen, one part oxygen.

• agent (B2): 7 occurrences in available subtitles.

  English meaning: Someone who acts for another person or organization.

  Subtitle example: Two FBI agents want to see you.

Compare with titles in similar genres

• The Machine: 14.6% B2, C1, and rare vocabulary (0.0 percentage points less than Chain Reaction).
• Westworld: 15.0% B2, C1, and rare vocabulary (0.4 percentage points more than Chain Reaction).
• Logan: 15.3% B2, C1, and rare vocabulary (0.7 percentage points more than Chain Reaction).

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: 2026-10-13