iPhone · Research guidance. Instructions are based on publisher guidance; a UK IPTV account was not tested on this platform.
The reset has a defined target
Apple’s shorthand guide says Reset Keyboard Dictionary deletes custom words and shortcuts and returns the dictionary to its default state. That is a meaningful change to a person’s writing setup. It should not be presented as a consequence-free test merely because the action does not have the same name as deleting an application.
Consider the access cost
A viewer may use saved words or shortcuts to enter long recurring phrases accurately. Removing that setup while investigating one model name could make ordinary communication harder. This is an illustrative consequence to consider, not a claim that every user stores the same vocabulary or that every application shares identical replacement behaviour.
Prefer a narrower question first
Check whether the issue is an accepted prediction, automatic correction, an explicit replacement or an app-specific checker. Use a harmless phrase and the documented undo or relevant setting where appropriate. A single unwanted substitution does not by itself establish that every custom dictionary entry is faulty.
Make any reset deliberate
If the named reset is still appropriate, read the current device confirmation and preserve any needed legitimate setup through a supported route. Report what was actually reset afterward. Avoid saying that the keyboard was cleaned while leaving the consequence unclear; the exact action matters when another support person tries to reconstruct the result.
Questions, answered
Can this reset remove custom words and shortcuts?
Yes. Apple explicitly describes that consequence.
Is it automatically the first step for one unwanted correction?
No. Inspect the narrower text-entry mechanism first.