 
 		newWord = {}
 		for word in words
-			newWord[word] = true if !newWord[word] && !cache.get(language + ':' + word)?
+			newWord[word] = true if !newWord[word] && !cache.has(language + ':' + word)
 		words = Object.keys(newWord)
 
 		if words.length
 			WorkerPool.check(language, words, ASpell.ASPELL_TIMEOUT, callback)
 		else
-			callback null, []
+			callback null, ""
 
 module.exports = ASpell =
 	# The description of how to call aspell from another program can be found here:

			suggestions = @getSuggestions(output)
			results = []
			for word, i in words
				if suggestions[word]?
					cache.set(language + ':' + word, suggestions[word])
					results.push index: i, suggestions: suggestions[word]
			callback null, results


	ASPELL_TIMEOUT : 4000

WorkerPool = new ASpellWorkerPool()
