I made an application that I think you will find very useful.
User Dictionary Manager (UDM) allows you to edit/export/import/delete/clean the user dictionary words on your Android phone.
I think this will come in very handy for ev...
You don't have acces to /data/data/... on non rooted phones. You can only access your own package /data/data/com.your_application
You can use the UDM tool i made to import words in the custom user dictionary.
User Dictionary Manager for Android ...