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Comment on SymSpell: 1M times faster spelling correctionparent

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Metaphone is good if you typed in something that sounds like the correct word. But often spelling typos are missing letters, or pressing a nearby letter instead of the one you meant.

For those the sound of the word isn't right, you need something that checks for nearby keys (I guess it needs to know the keyboard layout), and for missing or extra letters.

There are definitely two related concerns here:

- I mistyped the word.

- I don't know how to spell the word.

The errors in these two look quite different and may need different methods of correcting.

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