The spelling of the word "mattos" may lead to confusion due to the varied pronunciations of the letter combination "tt". In IPA phonetic transcription, the word is spelled as /məˈtəʊs/. The first "t" in "mattos" is pronounced as a voiced dental fricative /ð/, while the second "t" is pronounced as a voiceless dental plosive /t/. Therefore, the spelling of "mattos" accurately reflects its pronunciation. It is important to note the correct spelling and pronunciation in order to avoid confusion with similar sounding words.