The iPhone keyboard contains an internal catalog with over one hundred thousand words and expressions that the iOS operating system deliberately avoids presenting as automatic suggestions. This mechanism impacts functionalities such as gesture typing and predictive text, covering terms ranging from obscene to politically charged expressions.
This list was identified by researcher Derik Kauffman, founder of the startup Blacklight, while analyzing the code of the keyboard present in iOS version 26.3. As reported by Reuters, although users can type these expressions normally, the system will not proactively suggest them or assist in their composition.
Apple device users may have noticed that the keyboard does not correct profanities or other offensive content, such as sexually explicit material, nor does it recognize these terms when using gesture typing. However, this list extends beyond these limits, encompassing political phrases and mentions of public figures.
Among the examples found, in English, is the expression "dictator Trump," which refers to the United States president. A similar scenario occurs with politicians mentioned in Hindi, such as India's Prime Minister Narendra Modi. The keyboard also blocks conspiracy theory phrases, like "Covid was a hoax" (which translates loosely to Covid being a sham).
Of the 1,119 terms classified as "censored," 266 are in Portuguese, consisting mainly of variations of insults and common profanities in the Portuguese language. Nevertheless, the keyboard also prevents the suggestion of phrases such as "hates black people" and "Nazis are the best.".
Kauffman observed discrepancies in what the keyboard deems offensive. During his tests, the phrase "read smut" (read sexual fanfiction) could be typed using the swipe function, while the variation "read gay smut" (read gay erotic content) was altered by the system.
The researcher began his investigation into the keyboard's functionality in September, after noticing that certain words were frequently rejected or modified during the gesture typing process. To trace the origin of these restrictions, he employed tools such as Codex, developed by OpenAI, and Claude Code, from Anthropic.
The analysis performed by these artificial intelligences allowed for the location of the list stored in a hash table within iOS and subsequently converting it back to text format. Reuters points out that previous discoveries indicate that this type of filtering has been part of the iOS keyboard for some time.
In response to Reuters, Apple stated that the keyboard was designed to prevent automatic suggestions of words that might be judged as inappropriate or offensive. The company emphasizes that the feature does not prevent the user from manually writing the expressions and reiterates that it is possible to disregard the corrections offered by the keyboard.
Apple did not provide details on the criteria used to include political expressions in this list, nor did it confirm the exact number of terms contained in the database.



