The Portuguese wordlist was carefully checked manually by Portuguese and Brazilians in order to achieve a high level of quality. All the words are commonly used in both countries.
In addition the Portuguese wordlist was revised using Python in order to check the Levenshtein distance, words already used in other mnemonic sets and first 4 characters rules.
More details on the word selection process can be found in the Bitcointalk’s Portuguese section.
Portuguese wordlist rules:
- Words can be uniquely determined typing the first 4 characters.
- No accents or special characters.
- No complex verb forms.
- No plural words, unless there’s no singular form.
- No words with double spelling.
- No words with the exact sound of another word with different spelling.
- No offensive words.
- No words already used in other language mnemonic sets.
- The words which have not the same spelling in Brazil and in Portugal are excluded.
- No words that remind negative/sad/bad things.
- No very similar words with 1 letter of difference.