Turnitin Documents How It Detects Homoglyph and Hidden-Text Manipulation

Turnitin's official documentation confirms that its similarity-checking tool actively detects text manipulation techniques such as homoglyph substitution, where lookalike characters from other alphabets replace standard letters, and hidden text tricks like white-on-white formatting. The platform automatically swaps replaced characters back to their originals before scanning, meaning the similarity match still occurs despite the manipulation attempt. When suspicious patterns are found, a Flags tab appears on the submission with red markers highlighting the affected text for human review. The documentation notes that a flag is not an accusation of wrongdoing but a prompt for a reviewer to examine that section more closely. Turnitin explicitly acknowledges these techniques circulate on YouTube and social media as supposed methods of evading its detection.