Update string-transformations.md

Adding the GetLocalizedStringsTransformation claims transformation

Author: yoelhor

articles/active-directory-b2c/string-transformations.md

@@ -358,6 +358,75 @@ Use this claims transformation to format any string with two parameters, {0} and
 - Output claims:
     - **outputClaim**: Joe Fernando
 
+## GetLocalizedStringsTransformation 
+
+  Copies localized strings into claims.
+
+  | Item | TransformationClaimType | Data Type | Notes |
+ | ---- | ----------------------- | --------- | ----- |
+ | OutputClaim | The name of the localized string | string | List of claim types that is produced after this claims transformation has been invoked. |
+
+  To use the GetLocalizedStringsTransformation claims transformation:
+
+  1. Define a [localization string](localization.md) and associate it with a [self-asserted-technical-profile](self-asserted-technical-profile.md).
+ 1. The `ElementType` of the `LocalizedString` element must set to `GetLocalizedStringsTransformationClaimType`.
+ 1. The `StringId` is a unique identifier that you define, and use it later in your claims transformation.
+ 1. In the claims transformation specify the list of claims to be set with the localized string. The `ClaimTypeReferenceId` is a reference to a ClaimType already defined in the ClaimsSchema section in the policy. The `TransformationClaimType` is the name of the localized string as defined in the `StringId` of the `LocalizedString` element.
+ 1. In a [self-asserted technical profile](self-asserted-technical-profile.md), or a [display control](display-controls.md) input or output claims transformation, make a reference to your claims transformation.
+
+
+The following example looks up the email subject, body, your code message, and the signature of the email, from localized strings. These claims later used by custom email verification template.  
+
+Define localized strings for English (default) and Spanish.
+
+```XML
+<Localization Enabled="true">
+  <SupportedLanguages DefaultLanguage="en" MergeBehavior="Append">
+    <SupportedLanguage>en</SupportedLanguage>
+    <SupportedLanguage>es</SupportedLanguage>
+   </SupportedLanguages>
+
+  <LocalizedResources Id="api.localaccountsignup.en">
+    <LocalizedStrings>
+      <LocalizedString ElementType="GetLocalizedStringsTransformationClaimType" StringId="email_subject">Contoso account email verification code</LocalizedString>
+      <LocalizedString ElementType="GetLocalizedStringsTransformationClaimType" StringId="email_message">Thanks for verifying your account!</LocalizedString>
+      <LocalizedString ElementType="GetLocalizedStringsTransformationClaimType" StringId="email_code">Your code is</LocalizedString>
+      <LocalizedString ElementType="GetLocalizedStringsTransformationClaimType" StringId="email_signature">Sincerely</LocalizedString>
+     </LocalizedStrings>
+   </LocalizedResources>
+   <LocalizedResources Id="api.localaccountsignup.es">
+     <LocalizedStrings>
+      <LocalizedString ElementType="GetLocalizedStringsTransformationClaimType" StringId="email_subject">Código de verificación del correo electrónico de la cuenta de Contoso</LocalizedString>
+      <LocalizedString ElementType="GetLocalizedStringsTransformationClaimType" StringId="email_message">Gracias por comprobar la cuenta de </LocalizedString>
+      <LocalizedString ElementType="GetLocalizedStringsTransformationClaimType" StringId="email_code">Su código es</LocalizedString>
+      <LocalizedString ElementType="GetLocalizedStringsTransformationClaimType" StringId="email_signature">Atentamente</LocalizedString>
+    </LocalizedStrings>
+  </LocalizedResources>
+</Localization>
+```
+
+The claims transformation sets the value of the claim type *subject* with the value of the string id *email_subject*.
+
+```XML
+<ClaimsTransformation Id="GetLocalizedStringsForEmail" TransformationMethod="GetLocalizedStringsTransformation">
+  <OutputClaims>
+    <OutputClaim ClaimTypeReferenceId="subject" TransformationClaimType="email_subject" />
+    <OutputClaim ClaimTypeReferenceId="message" TransformationClaimType="email_message" />
+    <OutputClaim ClaimTypeReferenceId="codeIntro" TransformationClaimType="email_code" />
+    <OutputClaim ClaimTypeReferenceId="signature" TransformationClaimType="email_signature" />
+   </OutputClaims>
+</ClaimsTransformation>
+```
+
+### Example
+
+- Output claims:
+  - **subject**: Contoso account email verification code
+  - **message**: Thanks for verifying your account! 
+  - **codeIntro**: Your code is 
+  - **signature**: Sincerely  
+
+
 ## GetMappedValueFromLocalizedCollection
 
 Looking up an item from a claim **Restriction** collection.