BotDetect CAPTCHA Vietnamese Localization

This page contains the details of Vietnamese Captcha locales fully supported by BotDetect, for which there are both localized Captcha images and Captcha sounds available.

Supported Vietnamese CAPTCHA Locales

• vi-VN (Vietnamese)

Vietnamese CAPTCHA

Captcha Locale overview:

Language	Country	BotDetect Locale settings
Vietnamese	Vietnam	vi, vi-VN

Examples and specifications of individual Captcha feature localizations:

• Vietnamese localized Captcha images
• Vietnamese localized Captcha sounds
• Vietnamese localized Captcha codes

Vietnamese Localized CAPTCHA Images

Example Captcha images generated by BotDetect using the base Latin character set for all Captcha ImageStyle values can be seen in the BotDetect Captcha image styles demo

To use BotDetect Captcha images localized for the Vietnamese Captcha Locale in your application, you can specify the Locale value:

• In ASP.NET applications, you can use either the .aspx page source:

  <!-- Captcha control localized to Vietnamese -->
  <BotDetect:Captcha ID="SampleCaptcha" runat="server" Locale="vi-VN" />

  or the page code-behind:

  [C#]
      
  // Set the Captcha instance Locale to Vietnamese    
  SampleCaptcha.Locale = "vi-VN";

  [VB.NET]
      
  ' Set the Captcha instance Locale to Vietnamese    
  SampleCaptcha.Locale = "vi-VN"

  Locale-dependent Captcha strings can be configured in the <botDetect> Web.config configuration section.

• In ASP Classic applications, you can use either the application-global setting in the BotDetect\CaptchaConfig.asp file:

  ' Set the default Locale for all Captcha instances in the 
  ' Classic ASP application to Vietnamese
  LBD_Configuration_Locale = "vi-VN"

  or the Captcha object instance-specific value:

  <%
    Dim SampleCaptcha : Set SampleCaptcha = (New Captcha)("SampleCaptcha")
    SampleCaptcha.UserInputID = "CaptchaCode"
    ' Set the Captcha object instance Locale to Vietnamese
    SampleCaptcha.Locale = "vi-VN"
    Response.Write SampleCaptcha.Html
  %>

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Vietnamese Localized CAPTCHA Sounds

Example Captcha sounds generated by BotDetect using the Vietnamese Locale setting can be heard in the BotDetect Captcha features demo

To use BotDetect sounds localized for the Vietnamese Captcha Locale, you should also download the Vietnamese Pronunciation Sound Package and deploy the .bdsp file to the BotDetectSounds folder your application uses:

• ASP.NET applications use Bin\BotDetectSounds by default. A custom folder can be specified in the <botDetect> configuration section.
• ASP Classic applications use Redistribute\BotDetectSounds in the BotDetect installation folder by default. A custom folder can be specified in the BotDetect/CaptchaConfig.asp file.

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Vietnamese Localized CAPTCHA Codes

The vi-VN Captcha locale uses a modified version of the Latin character set without F,J,W,Z characters, for a total of 22 alpha characters.

CodeStyle.Alpha Vietnamese CAPTCHA Characters

Unicode code point	Name	Character
0x0041	a	A
0x0042	bê, bờ	B
0x0043	xê, cờ	C
0x0044	dê, dờ	D
0x0045	e	E
0x0047	giê, gờ	G (not used)
0x0048	hát, hờ	H
0x0049	i ngắn	I (not used)
0x004B	ca	K
0x004C	e-lờ	L (not used)
0x004D	em-mờ	M
0x004E	en-nờ	N
0x004F	o	O
0x0050	pê	P
0x0051	cu, quy	Q (not used)
0x0052	e-rờ	R
0x0053	ét-sì, sờ	S
0x0054	tê, tờ	T
0x0055	u	U
0x0056	vê, vờ	V
0x0058	ích-xì	X
0x0059	i dài, i-cờ-rét	Y

CodeStyle.Numeric Vietnamese CAPTCHA Characters

Unicode code point	Name	Character
0x0030	zero	0
0x0031	one	1
0x0032	two	2
0x0033	three	3
0x0034	four	4
0x0035	five	5
0x0036	six	6
0x0037	seven	7 (not used)
0x0038	eight	8
0x0039	nine	9

CodeStyle.Alphanumeric Vietnamese CAPTCHA Characters

Unicode code point	Name	Character
0x0041	a	A
0x0042	bê, bờ	B
0x0043	xê, cờ	C
0x0044	dê, dờ	D
0x0045	e	E
0x0047	giê, gờ	G (not used)
0x0048	hát, hờ	H
0x0049	i ngắn	I (not used)
0x004B	ca	K
0x004C	e-lờ	L (not used)
0x004D	em-mờ	M
0x004E	en-nờ	N
0x004F	o	O (not used)
0x0050	pê	P
0x0051	cu, quy	Q (not used)
0x0052	e-rờ	R
0x0053	ét-sì, sờ	S
0x0054	tê, tờ	T
0x0055	u	U
0x0056	vê, vờ	V
0x0058	ích-xì	X
0x0059	i dài, i-cờ-rét	Y
0x0030	zero	0 (not used)
0x0031	one	1 (not used)
0x0032	two	2 (not used)
0x0033	three	3
0x0034	four	4
0x0035	five	5
0x0036	six	6
0x0037	seven	7 (not used)
0x0038	eight	8
0x0039	nine	9

If you want to customize the exact character set used for Captcha code generation, you can specify your custom charsets in both ASP.NET and Classic ASP implementations of BotDetect.

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