Merge pull request #15881 from kedar-joshi

* pr/15881:
  Polish "Document internationalization support"
  Document internationalization support

spring-boot-project/spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -2005,6 +2005,35 @@ However, properties can be added to the `Environment` by using the relaxed rules
 
 
 
+[[boot-features-internationalization]]
+== Internationalization
+Spring Boot supports localized messages so that your application can cater to users
+of different language preferences. By default, Spring Boot looks for the presence of
+a `messages` resource bundle at the root of the classpath.
+
+NOTE: The auto-configuration applies when the default properties file for the configured
+resource bundle is available (i.e. `messages.properties` by default). If your resource
+bundle contains only language-specific properties files, you are required to add the
+default.
+
+The basename of the resource bundle as well as several other attributes can be configured
+using the `spring.messages` namespace, as shown in the following example:
+
+[source,properties,indent=0]
+----
+	spring.messages.basename=messages,config.i18n.messages
+	spring.messages.fallback-to-system-locale=false
+----
+
+TIP: `spring.messages.basename` supports comma-separated list of locations, either a
+package qualifier or a resource resolved from the classpath root.
+
+See {sc-spring-boot-autoconfigure}/context/MessageSourceProperties.{sc-ext}[
+`MessageSourceProperties`] for more supported options.
+
+
+
+
 [[boot-features-json]]
 == JSON
 Spring Boot provides integration with three JSON mapping libraries: