forum.supported.langs=en,ja,sv  # Add your language
```

### 4. Regenerate Auto-Generated Java Classes

Fess uses DBFlute's LastaFlute FreeGen to automatically generate Java constants from property files.

Run the regeneration command:

```bash
# Option 1: Using Maven from project root
mvn dbflute:freegen

# Option 2: Using DBFlute manage script
cd dbflute_fess
./manage.sh    # On Linux/Mac
manage.bat     # On Windows

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE components PUBLIC "-//DBFLUTE//DTD LastaDi 1.0//EN"
	"http://dbflute.org/meta/lastadi10.dtd">
<components>
	<component name="thumbnailManager" class="org.codelibs.fess.thumbnail.ThumbnailManager">
	</component>
	<component name="htmlThumbnailGenerator" class="org.codelibs.fess.thumbnail.impl.HtmlTagBasedGenerator">
		<property name="name">"htmlThumbnailGenerator"</property>
		<postConstruct name="addCondition">

import org.codelibs.fess.opensearch.config.exbhv.DataConfigBhv;
import org.codelibs.fess.opensearch.config.exentity.DataConfig;
import org.codelibs.fess.util.ParameterUtil;
import org.dbflute.cbean.result.ListResultBean;
import org.dbflute.cbean.result.PagingResultBean;
import org.dbflute.optional.OptionalEntity;

import jakarta.annotation.Resource;

/**
 * Service class for managing data configuration CRUD operations.

import org.codelibs.fess.opensearch.config.cbean.DuplicateHostCB;
import org.codelibs.fess.opensearch.config.exbhv.DuplicateHostBhv;
import org.codelibs.fess.opensearch.config.exentity.DuplicateHost;
import org.dbflute.cbean.result.PagingResultBean;
import org.dbflute.optional.OptionalEntity;

import jakarta.annotation.Resource;

/**
 * Service class for managing duplicate host configuration CRUD operations.

# /---------------------------------------------------------------------------
# databaseInfoMap: (Required)
#
# The database information for the tasks of DBFlute.
# You should specify before your first generating.
#
# o driver   -- The class name of JDBC-Driver.
# o url      -- The URL for connecting database.
# o schema   -- The schema name.
# o user     -- The database user name.
# o password -- The database password.

    # o aliasDelimiterInDbComment: (NotRequired - Default '')
    #  If the alias exists in its DB comment like as follows:
    #    member name : The name of member's full name
    #  you can use the alias in DBFlute world, java-doc, SchemaHTML...
    #  DB comment which does not have the delimiter is not treated
    #  as alias, treated as description (real comment).
    #  But you can change it by 'isDbCommentOnAliasBasis'.
    #

					<sourceDirectory>src/main/webapp/js</sourceDirectory>
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.dbflute</groupId>
				<artifactId>dbflute-maven-plugin</artifactId>
				<configuration>
					<dbfluteVersion>${dbflute.version}</dbfluteVersion>
					<packageBase>org.codelibs.fess.dbflute</packageBase>
					<clientProject>fess</clientProject>
					<dbfluteClientDir>${basedir}/dbflute_fess</dbfluteClientDir>

import org.dbflute.dbway.DBDef;
import org.dbflute.jdbc.SQLExceptionDigger;
import org.dbflute.jdbc.StatementConfig;
import org.dbflute.jdbc.StatementFactory;
import org.dbflute.optional.RelationOptionalFactory;
import org.dbflute.outsidesql.OutsideSqlOption;
import org.dbflute.outsidesql.factory.OutsideSqlExecutorFactory;
import org.dbflute.s2dao.jdbc.TnResultSetHandlerFactory;
import org.dbflute.s2dao.metadata.TnBeanMetaDataFactory;

import org.dbflute.Entity;
import org.dbflute.dbmeta.AbstractDBMeta;
import org.dbflute.dbmeta.info.ColumnInfo;
import org.dbflute.dbmeta.info.UniqueInfo;
import org.dbflute.dbmeta.name.TableSqlName;
import org.dbflute.dbmeta.property.PropertyGateway;
import org.dbflute.dbway.DBDef;
import org.dbflute.util.DfTypeUtil;

/**
 * @author ESFlute (using FreeGen)
 */

import org.dbflute.Entity;
import org.dbflute.dbmeta.AbstractDBMeta;
import org.dbflute.dbmeta.info.ColumnInfo;
import org.dbflute.dbmeta.info.UniqueInfo;
import org.dbflute.dbmeta.name.TableSqlName;
import org.dbflute.dbmeta.property.PropertyGateway;
import org.dbflute.dbway.DBDef;
import org.dbflute.util.DfTypeUtil;

/**
 * @author ESFlute (using FreeGen)
 */