}
                    reading = transliterator.transliterate(reading);

                    final int pos = text.indexOf(term, offset);
                    if (pos > 0) {
                        final String tmp = text.substring(offset, pos);
                        readingBuf.append(transliterator.transliterate(tmp));
                        offset = pos;

                    kanaBuf.append(transliterator.transliterate(tmp));
                    offset = pos;
                } else if (pos == -1) {
                    continue;
                }

                String reading = getReadingFromAttribute(stream);
                if (Strings.isNullOrEmpty(reading)) {
                    reading = transliterator.transliterate(att.toString());
                }

 * </pre>
 *
 * @see com.ibm.icu.text.Transliterator
 */
public class ICUNormalizer implements Normalizer {
    /** The transliterator used for normalization. */
    private final Transliterator transliterator;

    /**
     * Constructor for ICUNormalizer.
     * @param transliteratorId The ID of the transliterator to use.
     * @throws IllegalArgumentException if transliteratorId is null or invalid

    /** Transliterator for full-width to half-width conversion. */
    protected Transliterator fullWidthHalfWidth;

    /** Transliterator for any-lower. */
    protected Transliterator anyLower;

    /**
     * Constructor for KatakanaToAlphabetConverter.
     */
    public KatakanaToAlphabetConverter() {
        fullWidthHalfWidth = Transliterator.getInstance("Fullwidth-Halfwidth");

        }
    }

    public void test_invalidTransliteratorId() {
        try {
            new ICUNormalizer("Invalid-Transliterator-ID-12345");
            fail("Expected IllegalArgumentException");
        } catch (IllegalArgumentException e) {
            assertTrue(e.getMessage().contains("Invalid transliterator ID"));
        }
    }

        String text = "テスト";
        String field = "content";

        List<String> results = converter.convert(text, field, "ja");

        assertNotNull(results);
        // Should use Japanese analyzer and transliterator
    }

    @Test
    public void testConvertWithMixedLanguageText() throws IOException {
        // Test convert with mixed language text
        String text = "test テスト";
        String field = "content";