protected void addUncountable(String... words) {
        requireNonNullElements(words);
        Stream.of(words).map(normalizeMapper()).forEach(uncountables::add);
    }
Returns if the provided word is considered as an uncountable.

@param word to check
@return if the provided word is considered as an uncountable
generator-parent/generator-translator/src/main/java/com/speedment/generator/translator/util/Pluralis.java