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How do I edit the list of words in the Thunderbird spell-checker?

  • 3 replies
  • 1 has this problem
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  • Last reply by Graeme V

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This question already exists in this forum. 1: It's archived, so I need to re-ask to comment 2: Using the full subject of this question as a search on this forum does NOT find the article

...however it is the top match when searching for that subject is google.


...and the answer is:

<Thunderbird profile location>/persdict.dat

(If you don't know where your profile directory is, use Help->"Troubleshooting information" )

This question already exists in this forum. 1: It's archived, so I need to re-ask to comment 2: Using the full subject of this question as a search on this forum does '''NOT''' find the article ...however it is the top match when searching for that subject is google. ...and the answer is: <Thunderbird profile location>/'''persdict.dat''' (If you don't know where your profile directory is, use Help->"Troubleshooting information" )

Chosen solution

There are two ways of editing the Personal Dictionary. Either via Thunderbird or by accessing the 'persdict.dat 'file in the 'profile name' folder.

You can only add and edit words you have added, to the 'Personal Dictionary'. If you have added words to the 'Personal Dictionary' or want to add some words: Via Thunderbird: Click on 'Write' to open new message compose window click on 'Spelling' to open the 'Check Spelling' window in 'Personal Dictionary' area - click on 'Edit' A new window opens called 'Personal Dictionary' You can select a word and click on 'Remove'. You can type a word in the 'New word' field and then click on 'Add' to add to list. Click on 'Close'


Where is this stored within the Thunderbird Profile so I can do it manually and directly to file? Menu app icon > Help > More Troubleshooting Information Under 'Application Basics' half way down is 'Profile Folder' - click on 'Open Folder' This opens a new window showing the contents of the 'profile name' folder. You will see a file called 'persdict.dat' That file can be opened using a simple text editor like Notepad. The words will be listed one below the other on far left.

If you manually wanted to edit that file, you must Exit/close Thunderbird Now. You must add single words one below another: isn't can't don't

Then save the file. Those words will be available in the 'Personal Dictionary'.

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Chosen Solution

There are two ways of editing the Personal Dictionary. Either via Thunderbird or by accessing the 'persdict.dat 'file in the 'profile name' folder.

You can only add and edit words you have added, to the 'Personal Dictionary'. If you have added words to the 'Personal Dictionary' or want to add some words: Via Thunderbird: Click on 'Write' to open new message compose window click on 'Spelling' to open the 'Check Spelling' window in 'Personal Dictionary' area - click on 'Edit' A new window opens called 'Personal Dictionary' You can select a word and click on 'Remove'. You can type a word in the 'New word' field and then click on 'Add' to add to list. Click on 'Close'


Where is this stored within the Thunderbird Profile so I can do it manually and directly to file? Menu app icon > Help > More Troubleshooting Information Under 'Application Basics' half way down is 'Profile Folder' - click on 'Open Folder' This opens a new window showing the contents of the 'profile name' folder. You will see a file called 'persdict.dat' That file can be opened using a simple text editor like Notepad. The words will be listed one below the other on far left.

If you manually wanted to edit that file, you must Exit/close Thunderbird Now. You must add single words one below another: isn't can't don't

Then save the file. Those words will be available in the 'Personal Dictionary'.

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I have added some relevant words in the tags which may help the search.

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Thanks Toad-Hall , that is indeed the solution.

I'll add a comment, as it took me several attempts to navigate.

Toad-Hall said

Click on 'Write' to open new message compose window click on 'Spelling' to open the 'Check Spelling' window

Write is "sometimes visible button" (view -> mail toolbar) ...so you may not have it. So in the original Thunderbird window File->new (or however you compose a new message) then in new window that pops up (e.g. "write window") IFF you have the composition bar visible (view->toolbars->composition bar) hit the spelling button in that bar, otherwise use options->check spelling (or just ctrl->shift->P)