COMMA_SPLITTER
            .trimResults()
            .withKeyValueSeparator(Splitter.on(':').trimResults())
            .split("boy  : tom , girl: tina , cat  : kitty , dog: tommy ");
    ImmutableMap<String, String> expected =
        ImmutableMap.of("boy", "tom", "girl", "tina", "cat", "kitty", "dog", "tommy");
    assertThat(m).isEqualTo(expected);
    assertThat(m.entrySet()).containsExactlyElementsIn(expected.entrySet()).inOrder();

3. **Fallback**: English (from `fess_label.properties` and `fess_message.properties`)

### Document Language Detection

During crawling and indexing, Fess:

1. Detects language from document content using Apache Tika
2. Validates against `supported.languages` list
3. Creates language-specific fields (e.g., `content_ja`, `title_en`, `content_sv`)
4. Applies language-specific analyzers for better search results

        } else {
            cmdList.add("-Dfess.log.level=" + logLevel);
            if ("debug".equalsIgnoreCase(logLevel)) {
                cmdList.add("-Dorg.apache.tika.service.error.warn=true");
            }
        }
        stream(fessConfig.getJvmCrawlerOptionsAsArray())
                .of(stream -> stream.filter(StringUtil::isNotBlank).forEach(value -> cmdList.add(value)));

   * might be null, or you need support for {@link List#set(int, Object)}, use {@link
   * Arrays#asList}.
   *
   * <p>Note that even when you do need the ability to add or remove, this method provides only a
   * tiny bit of syntactic sugar for {@code new ArrayList<>(}{@link Arrays#asList asList}{@code
   * (...))}, or for creating an empty list then calling {@link Collections#addAll}. This method is
   * not actually very useful.
   */

    checkNotNull(strategy);

    if (expectedInsertions == 0) {
      expectedInsertions = 1;
    }
    /*
     * TODO(user): Put a warning in the javadoc about tiny fpp values, since the resulting size
     * is proportional to -log(p), but there is not much of a point after all, e.g.
     * optimalM(1000, 0.0000000000000001) = 76680 which is less than 10kb. Who cares!
     */