Generate a paragraph of "Lorem ipsum" text
@param {Object} dict Words dictionary (see `lang/*.json`)
@param {Number} wordCount Words count in paragraph
@param {Boolean} startWithCommon Should paragraph start with common
"lorem ipsum" sentence.
@returns {String}
function paragraph(dict, wordCount, startWithCommon) {
	const result = [];
	let totalWords = 0;
	let words;

	if (startWithCommon && dict.common) {
		words = dict.common.slice(0, wordCount);
		totalWords += words.length;
		result.push(sentence(insertCommas(words), '.'));
	}

	while (totalWords < wordCount) {
		words = sample(dict.words, Math.min(rand(2, 30), wordCount - totalWords));
		totalWords += words.length;
		result.push(sentence(insertCommas(words)));
	}

	return result.join(' ');
}