...
Now look for a value in Resource.properties file with the relevant locale. If a match is found, define a value for the property. Otherwise use add new property entry to the relevant locale based on the Resource file, as explained above. If you don't specify a value for the key obtained after #03, the error message itself will be displayed in the UI, as default.
Configuring Localization for Recovery Endpoints
Similarly, you can enable localization for accountrecoveryendpoint by applying the same above steps 1 through 7 in the previous section starting with the following location.
<IS_HOME>/repository/deployment/server/webapps/accountrecoveryendpoint/WEB-INF/classes/org/wso2/carbon/identity/mgt/recovery/endpoint/i18n.