Portuguese makes use of five diacritics: the cedilla (ç), acute accent (á, é, í, ó, ú), circumflex accent (â, ê, ô), tilde (ã, õ), and grave accent (à, and rarely è, ì, ò, and ù). The cedilla indicates that ç is pronounced /s/ (from a historic palatalization).

When instances that are discovered that contain these characters they are displayed as a black diamond with a question mark.