Duolingo
"duolingo" is a 8-letter English headword indexed on PlainSpell.
The verdict
“Duolingo” is an uncommon English word, ranked #77,622 in English word frequency and used as a noun.
- #77,622
- frequency rank, English
- 8
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A language learning service or application.
| Property | Value |
|---|---|
| Headword | Duolingo |
| Language | English |
| Part of speech | Noun |
| Letters | 8 |
| Frequency rank | #77,622 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “Duolingo” sits in English frequency
Spelling & Dictionary Insight
The English entry for Duolingo is 8 letters long, classified as a noun. Corpus data places it at rank #77,622 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 4 distinct senses for this headword, so context determines which meaning a reader should apply.
Our edit-distance generator produced no likely misspellings for Duolingo, typically a sign the spelling maps closely to how the word sounds. We don't track a confusable pairing for this entry, since its spelling is unusual enough that it doesn't cluster with a lookalike.
Etymologically, the entry records: All senses ultimately from Duolingo, a language learning app owned by the American educational technology company of the same name; from duo- (“two”) + lingo (“language”). The first two senses formed via genericized trademark. The correct English form is Duolingo, spelled D-U-O-L-I-N-G-O.
Definition
- 1A language learning service or application.
- 2A website, service or application that gamifies or simplifies learning, such as through having convenient, guided lessons and an informal (laidback) educational environment.
- 3A lesson on Duolingo.
- 4A language learning course on Duolingo.
Etymology
All senses ultimately from Duolingo, a language learning app owned by the American educational technology company of the same name; from duo- (“two”) + lingo (“language”). The first two senses formed via genericized trademark.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Using “Duolingo”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is D-U-O-L-I-N-G-O - every other letter order is a misspelling in standard orthography.
- Browse more English words and confusable pairs in the same reference. English words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.