Can you change the O/S language after the initial setup

You need to use the remote to go to the setup menu and set the language to English, or if you are in the USA set it to US English, which is different from English.

Found below instructions - should work to change from chinese as well.

Your Brother machine's LCD can display information in English or Spanish. The default language is English.
To change the language on your Brother machine's LCD, follow these steps:

1. Press Menu, 0 (Initial Setup), 0 (Local Language).
   
   
2. Press the Up or Down arrow key to choose English or Espanol.
   
   
3. Press the OK key.
   
   
4. Press the Stop/Exit key.

Click here to download the user manual to your device. It has all details.

Go to Menu > Settings > Initial Setup > Language > English.
In Spanish it would be like Menú > Configuración > Configuración Inicial > Idioma > English.

GO TO SETTINGS AND THEN CLICK INITIAL SETUP AND THEN SELECT LANGUAGE AND PRESS CHAGE THEN SET LANGUAGE TO ENGLISH

Display Language
You can select either “English” or “Spanish” as the display language. The factory
preset is “English”.
• If you select a language you cannot read, change the display language again

1 Press [MENU].
2 Scroll to “Initial setting” by pressing [up]
or [down], then press Select.
3 Scroll to “Change language” by pressing [up]
or [down], then press Select.
4 To change from English to Spanish, press
Español.
To change from Spanish to English, press
English.
• The display changes to the selected language.
• You can also select a language by pressing [up] or
[down].
5 When Spanish is selected, press Salvar, then press [OFF].
When English is selected, press Save, then press [OFF].

Just go to Meniu principal (main meniu) select Configuración (settings) click SELECCIONAR (select) then scroll down to CONFIGURACIóN INICIAL (initial setup) click SELECCIONAR (select) again and then scroll down to IDIOMA (language) and from there select english, thats it.(Or just go to the Motorola web site and download the full manual and used icons shown there to get where you wanted to go. )

Settings Menu - El Menú de las escenas
Initial Setup - El Arreglo inicial
Language - El idioma
English - Inglés

Hopefully that should point you in the right direction.

You need to flash a different language pack to the phone.
Look at this online manual on how to hack and upgrade the V3
http://v3x.themotoguide.com/index.php?PID=1&PGID=433#
Then:
Get language pack here:
http://www.planetmotox.net/language_packs.php
I have used this one. It is a modified language pack with only english.
R374_G_0E.41.C0R_MXLP0001_reflash_MOTOX.shx 

now flash to your phone and you will have only english