Counts vowel groups inside a word.

@param {string} word A text with words to count syllables.
@param {String} locale The locale to use for counting syllables.
@returns {number} the syllable count.
function( word, locale ) {
	var numberOfSyllables = 0;
	var vowelRegex = new RegExp( "[^" + syllableMatchers( locale ).vowels + "]", "ig" );
	var foundVowels = word.split( vowelRegex );
	var filteredWords = filter( foundVowels, function( vowel ) {
		return vowel !== "";
	} );
	numberOfSyllables += filteredWords.length;

	return numberOfSyllables;
}