5.10.2. Setting the Error Message Language
By default, mysqld produces error messages in
English, but they can also be displayed in any of these other
languages: Czech, Danish, Dutch, Estonian, French, German,
Greek, Hungarian, Italian, Japanese, Korean, Norwegian,
Norwegian-ny, Polish, Portuguese, Romanian, Russian, Slovak,
Spanish, or Swedish.
To start mysqld with a particular language
for error messages, use the
-L option. The option value can be a language
name or the full path to the error message file. For example:
The language name should be specified in lowercase.
By default, the language files are located in the
directory under the MySQL base directory.
You can also change the content of the error messages produced
by the server. Details can be found in the MySQL Internals
manual, available at https://dev.mysql.com/doc/. If you
upgrade to a newer version of MySQL after changing the error
messages, remember to repeat your changes after the upgrade.