import org.lastaflute.web.validation.theme.typed.LongTypeValidator;
import org.opensearch.search.sort.SortBuilder;
import org.opensearch.search.sort.SortBuilders;
import org.opensearch.search.sort.SortOrder;

public interface FessProp {

    String API_PING_SEARCH_ENGINE_FIELD_SET = "apiPingSearchEngineFieldSet";

    String QUERY_HIGHLIGHT_TERMINAL_CHARS = "queryHighlightTerminalChars";

```

This will regenerate:
- `src/main/java/org/codelibs/fess/mylasta/action/FessLabels.java`
- `src/main/java/org/codelibs/fess/mylasta/action/FessMessages.java`
- `src/main/java/org/codelibs/fess/mylasta/direction/FessProp.java`

### 5. Rebuild the Project

```bash
mvn clean package
```

### 6. Test the New Language

1. **Start Fess:**
   ```bash
   # Run the main class in your IDE

import org.lastaflute.core.direction.exception.ConfigPropertyNotFoundException;

/**
 * @author FreeGen
 */
public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction.FessProp {

    /** The key of the configuration. e.g. Fess */
    String DOMAIN_TITLE = "domain.title";

    /** The key of the configuration. e.g. default */
    String search_engine_TYPE = "search_engine.type";