Apple’s iPhone keyboard reportedly keeps an undisclosed, multilingual “gray list” of words and phrases that it generally avoids suggesting through autocomplete or producing through swipe-typing. The list does not prevent someone from entering those words manually. Independent researcher Derik Kauffman put its size at about 100,000 entries, excluding Chinese characters, but Apple has not confirmed that estimate.
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What the gray list does
Autocomplete offers predicted words as someone types; swipe-typing lets them form words by gliding a finger across the keyboard. According to Reuters, phrases on the reported list generally are not suggested through either feature. That can make some expressions less convenient to enter, but it is not a block on writing them in a message or email.
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Kauffman said he discovered the list in September after noticing that swipe-typing faltered on certain phrases. He used OpenAI’s Codex and Anthropic’s Claude Code while investigating the behavior, according to a Reuters report. The available reporting does not establish the precise technical method he used to identify the list.
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What researchers reported finding
Reuters described the list as containing tens of thousands of words and phrases, while Kauffman’s conservative estimate was about 100,000 entries, not counting Chinese characters. The count is his estimate, not an Apple-confirmed figure. Kauffman said most flagged entries were vulgar, offensive, or related to drugs, sex or violence.
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Some reported entries were politically charged. Examples include “dictator Trump” and “Sleepy Joe”; another report also named “Tibetan independence” and “United Ireland.”
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Kauffman also reported uneven results for similar expressions: his keyboard struggled with “white man” and “bad boy,” but not “black man” or “bad girl.” He said “read smut” could be swipe-typed while “read gay smut” could not.
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18 Those examples illustrate inconsistent behavior; they do not, on their own, explain why particular phrases were included.
Apple’s response—and what remains unconfirmed
Apple did not directly confirm the reported list’s size or composition, or explain why particular political expressions appeared in it. The company said users can choose to type specific words or phrases and can override predictive-text suggestions. It also said the keyboard is designed to avoid offering suggestions that could be inappropriate or offensive.
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The available reporting supports the distinction between filtering keyboard suggestions and blocking manual entry. It does not confirm a specific storage mechanism, including claims about hashed entries, or establish every example attributed to the list. Those details should be treated as unverified unless Apple or further reporting confirms them.
Why the distinction matters
A keyboard that withholds suggestions does not prevent communication, but it can make some phrases harder to enter using predictive features. Because Apple has not explained the list’s full contents or selection rules, users may not know whether a failed suggestion reflects ordinary prediction behavior or a deliberate exclusion. The reported inconsistencies make that uncertainty especially visible, without proving the reason for any individual entry.
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