PlainSpell tools
Spelling tools & quizzes
According to the PlainSpell database, this corpus holds 6,918,744 words across 5 languages, with definitions, confusable pairs, and homophones compiled from Wiktionary (CC BY-SA, May 2026) - see the methodology and editorial policy for sources, limits, and corrections. These free, no-sign-up tools draw on that same citation-backed data; nothing to install, and your progress stays on your device.
- 6,918,744
- words
- 5
- languages
- 3,375,996
- confusable pairs
- 2,182
- EN homophones
What makes these tools different
Every PlainSpell quiz and lookup draws on the same Wiktionary-sourced corpus, definitions, IPA pronunciation, confusable-pair data, and homophones, so the tools reinforce each other and every answer links back to a citable reference page.
- 6,918,744
- words in the corpus
- 3,375,996
- confusable pairs
- 2,182
- EN homophones
According to PlainSpell database (Wiktionary, CC BY-SA, May 2026). Below: the interactive tools, corpus coverage by language, and explore-the-corpus links.
Interactive Tools
- Quiz Spelling Challenge A 10-question spelling test: read a definition and pick the correctly-spelled word from four options (one correct, three real misspellings from the corpus). Your best score is saved on this device. Start the quiz →
- Quiz Homophone Challenge A 10-question quiz on English homophones, read a definition and pick the correctly-spelled word (one vs won, what vs watt). Your best score is saved on this device. Start the quiz →
More quizzes and checkers are in development. Every tool draws on the same citation-backed corpus.
The Data Behind the Tools
Corpus coverage by language
Headwords indexed per language, the dictionary the quizzes and lookups draw from
- Fre
French
4,485,239 words
- Ger 1,077,739
German
1,077,739 words
- Spa 770,428
Spanish
770,428 words
- Eng 545,755
English
545,755 words
- Por 39,583
Portuguese
39,583 words
What this shows PlainSpell indexes 6,918,744 headwords across 5 languages, sourced from Wiktionary (CC BY-SA). Every interactive tool reads from this same live corpus.
Explore the Corpus
Put the tools to work
Each quiz builds the same recognition skill, seeing the correct form immediately, without thinking about the rule.
- Take the Spelling Challenge first, 10 questions drawn from real misspellings in the Wiktionary corpus. The hardest questions use common words that almost always trip people up: separate, definitely, accommodate. Start Spelling Challenge
- Then try the Homophone Challenge, 10 questions on sound-alike pairs (one/won, bare/bear, there/their/they're). Different skill from misspelling recognition; easier to get wrong in fast writing. Start Homophone Challenge
- Practice 25 commonly misspelled English words with error-pattern breakdowns and memory cues for the words that keep tripping you up. 25 practice words
Download the corpus statistics extract cited on this page: plainspell-corpus-statistics.csv (CC BY-SA 4.0).