Twitter agents questions

[1mfaasj]

Hi

Iam using the Twitter Stream Agent but unfortunately I do not find good documentation which options you have.
For example, I want to be able to filter based on the language of the tweet, so only English tweets, is that possible?

My json looks like this:

{
   "filters": [
     "hashtag1",
     "hashtag2"
   ],
   "expected_update_period_in_days": "2",
   "generate": "events"
}

but after adding this: "lang": "en"
it is still looking for non English tweets...

Beside. I also have a question about the Twitter Action Agent, it says: This type of Agent cannot be scheduled.
but where can I see / set how often / which tweets will now be retweeted (from Twitter Stream Agent)?
at this moment, it seems like it retweets every x minutes ?