In Notes Standard
Click File Preferences
Macintosh OS X users: Click Lotus Notes Preferences. Click Regional Settings. Click the Change button for Sorting
Optional: Select Display all sort rules to see a list of languages. Optional : If you use Unicode fonts, click Unicode standard ...
In Notes 8.5.2, you can sort messages by type, such as email, to do, or calendar entry. Click the type icon to sort messages by type.
Change the language you sort in.