There is a method of changing vold.fstab under system/etc folder but it is difficult and may brick your phone
The safest way is app called foldermount there is a free and paid version .... search for it and in the app go to setting put autostart on
I've made some changes for t9 arabic users
you must first copy the app to system/app folder and put permission r+++ w+-- 644
App link
https://www.dropbox.com/s/ezhcf45kal864it/Contacts.apk
Put zhuyin dictionary
And it work like a charm
Search rom 23 multilingual .... it has google play and apps
https://goo.im/devs/ibotpeaches/miuiandroid/releases/redmi-note/xiaomi.eu_multi_lcsh92_wet_jb9_JHDCNBE23.0_jb-4.2.zip
Why ..... go into app and look for the pin it should be green . If it is white ... click it and it turn to green
Go to setting and set autorun
And put time to start 30 sec
Do the same action ... download the 23 rom ..... put it in sd card .... and go to update app..... select manually update and select the file from sd card