by Allen Wyatt
(last updated March 9, 2020)
Fairly frequently Fred has a document, usually consisting of copied and pasted paragraphs, that shows certain technical words as unknown (underlined and prompting to check spelling or add to custom dictionary). However, the marked words are ones that Fred previously added to his custom dictionary, which makes him wonder why Word doesn't hold onto those words he previously added. He further notes that the words are not immediately lost from the dictionary; it usually happens after some months.
The fact that this behavior doesn't happen all the time makes it particularly bothersome to try to track down. (Intermittent problems are some of the most vexing.) That being said, there are a few things you can check out.
First, you should try to determine if this happens with only a given document or subset of documents that you work with. If you can narrow it down to a set of suspect documents, then there is a chance that those documents are corrupted in some way. Document corruption doesn't always make the document in question inaccessible; it may just make the document act erratically from time to time. If you suspect this is the case, copy everything from the suspect document—except the final paragraph mark in the document—to a brand-new document.
Second, it could be that the information you are copying and pasting isn't recognized as being in the correct language for your custom dictionary to work. Custom dictionaries are tied to specific languages. To provide a simple example, you could have added a word to the US English custom dictionary. However, if the paragraph you pasted is designated in a different language (such as UK English), then the US English custom dictionary is never consulted when doing the spell check. You can verify if this is the problem by looking at the language associated with a problem paragraph or word.
Third, the problem could be due to actual corruption of the custom dictionaries. This is a longshot, as we've never seen much corruption of these files. If you can display and edit the dictionaries, then there likely is no problem. Even so, you may want to make backing up of these files a part of the regular protection regimen for your system.
Fourth, it is possible that Word has gotten confused and forgotten where the custom dictionaries are located. (Exactly what causes this is unknown, but it has been reported by some Word users.) To check if Word is actually finding your custom dictionary, follow these steps:
Figure 1. The Custom Dictionaries dialog box.
Hopefully these suggestions will help to alleviate the frustration of getting inconsistent results with the spelling checker.
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