String[] texts = new String[tweets.size()];
Language[] froms = new Language[tweets.size()];
Language[] tos = new Language[tweets.size()];
try {
Language toLanguage = Language.fromString(toLang);
Iterator<JTweet> iter = tweets.iterator();
for (int i = 0; i < texts.length; i++) {
JTweet tweet = iter.next();
index2Id.put(i, tweet.getTwitterId());
texts[i] = tweet.getText();