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

My Stepmother Is an Alien
Unique vocabulary and phrases by level
How difficult is My Stepmother Is an Alien in English?
My Stepmother Is an Alien: 63.6% A1–A2 vocabulary; 15.9% B2, C1, and rare vocabulary. Vocabulary size: 1,490.
Unique vocabulary
- For A2 learners: 27.8% of unique vocabulary is above A2 or marked rare. Expect substantial preparation; start with short scenes and English subtitles.
- For B1 learners: 15.9% of unique vocabulary is above B1 or marked rare. Preview recurring words and use English subtitles.
- For B2 learners: 11.1% of unique vocabulary is above B2 or marked rare. Preview recurring words and use English subtitles.
8.6% Unclassified. Unclassified vocabulary has no reliable level assignment.
Vocabulary weighted by word occurrences
90.3% A1–A2 vocabulary; 4.1% B2, C1, and rare vocabulary; 2.4% 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
- celeste (rare): 58 occurrences in available subtitles.
Subtitle example:
And do you Celeste van Martin take Steven Mills
- planet (B1): 24 occurrences in available subtitles.
Subtitle example:
Do you believe that there's life on other planets?
- lightning (B1): 15 occurrences in available subtitles.
Subtitle example:
But if we increase the power of the Klystron using lightning,
- feeling (B1): 14 occurrences in available subtitles.
Subtitle example:
♪ 'Did you ever have the feeling that you wanted to go?
- exhale (rare): 12 occurrences in available subtitles.
Subtitle example:
(Exhales)
Compare with titles in similar genres
- Flubber: 15.9% B2, C1, and rare vocabulary (0.0 percentage points less than My Stepmother Is an Alien).
- Monkey Business: 16.0% B2, C1, and rare vocabulary (0.1 percentage points more than My Stepmother Is an Alien).
- The Man in the White Suit: 16.0% B2, C1, and rare vocabulary (0.1 percentage points more than My Stepmother Is an Alien).
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: