Search notes:

%APPDATA%\Microsoft\UProof

CUSTOM.DIC

CUSTOM.DIC is the custom dictionary file.
This file contains with one entry per line.
The U in the directory name stands for Unicode. This is a hint that such a dictionary file is a UTF-16 encoded file.
See also RoamingCustom.dic and HKEY_CURRENT_USER\Software\Microsoft\Shared Tools\Proofing Tools\1.0\Custom Dictionaries

See also

%APPDATA%\Microsoft\Spelling
The parent directory %APPDATA%\Microsoft

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/Windows/...', 1758209742, '216.73.216.150', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/Windows/dirs/Users/username/AppData/Roaming/Microsoft/UProof/index(51): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78