Localize to Vietnamese for LMS

[vthily]

Description: Localize all the messages on LMS website to Vietnamese.

• Duy to inspect and list all the messages in this website https://courses.steamforvietnam.org/
• Lãm to help translate into Vietnamese, also collaborate with Duy on the workflow and common use cases when using/interacting with LMS.
• Ly to set the global language_code to vi.

[vthily]

When user hasn't logged in to the LMS (https://courses.steamforvietnam.org/), or hasn't set the language to "Tiếng Việt", the default language code="en"

To change the UI to Vietnamese, pls update on your profile/account page.

1. Login to the LMS, select Account (or "Tài khoản")

2) Select the language to Vietnamese | "Tiếng Việt"

3. Most of messages are in Vietnamese.

[vthily]

Have to compile the translation file after updating messages

# sudo yum install gettext
# apt-get install gettext

msgfmt messages.po -o messages.mo

https://docs.djangoproject.com/en/3.2/topics/i18n/translation/