Since MIUI is originally released in Chinese language, for those who doesn’t know Chinese language have to rely on the language pack after the flashing of the ROM (one exception that I know is miui.us which has the English language included inside the ROM before releasing to the community), and sometimes it can goes haywire if the flashing method is inappropriate, especially upgrading your current ROM to the next weekly updated one. Most of the time incorrect flashing can cause crashing ROM, multiple FCs etc., thus to avoid it, a proper flashing method should be used.

Here I will show you the method I used to update the weekly-updated MIUI ROM to my Samsung Nexus S (which doesn’t have any issue at all so far, except known bugs in the ROM). I used MIUIAndroid.com English ROM, simply because it works well for me (still hoping for Google Services added automatically though), so the steps below are based on this ROM:

1. Download the correct ROM and matching Language Pack from MIUI Android ROM download section
2. Place these two files to your device flash memory
3. Turn off your device, and then load into bootloader
4. Enter recovery mode
5. Wipe cache partition
6. Advanced > Wipe dalvik cache
7. Install zip from sdcard > Choose zip from sdcard > Select the zip file for ROM
8. Once the installation of ROM is done, reboot the device
9. Wait until the device boot into the newly flashed MIUI ROM (Yes, it will be in Chinese Language)
10. Turn off your device again, then load into bootloader
11. Enter recovery mode
12. Wipe cache partition
13. Advanced > Wipe dalvik cache
14. Install zip from sdcard > Choose zip from sdcard > Select the zip file for Language Pack
15. Once the installation of the language pack is done, reboot the device again
16. The update should be done by now. Enjoy your updated ROM!