Just finishedthe rollback from 14233 to 8.1 update 1 then all the way to 10586.218
However it's sad that I find after I reset and restored everything from my previous setting (14295.1004), I still couldn't add input method for other language in 10586.218.....I can't believe after these much versions MSFT still can fail on this simple thing....
And yet this just a prefect DEMO of how terrible the restore system MSFT provide. I got everything settled in my previous working backup, I have 3 input method in two languages and just the US english in my list now. I have my scale down to 150% and my tiles are sitting well in a 4-column layup, the backup just reload all my tiles - in a 3-column layup. Am I supposed to be happy that this in not my daily phone and just limited apps/tiles were there so there's not much work to do? I'm getting tired of this half-baked BS...
But I have to say that going production ring to build 218 I can feel the performance and soomthness are better than any build I've tried before. I guess I'll leave my device as my bed time reader...
######UPDATED######
After received an update last night the keyboard language back to life. I can enjoy build 218 now.