Poketuber advice

[lil' starfish]

I speak both Spanish and English fluently, what's the best thing to do if I start playing a game/hack in Spanish? If I start off with an English game, should I announce that the next game I'll be playing is in Spanish, therefore during the entire video I'll be talking in Spanish, and vice versa? My audience is mostly American and I don't want to alienate it. Making a 2nd channel is an option, but I'm still not convinced, I don't want to divide my audience or anything like it.

Also, is it better to upload finished videos on Youtube, or stream as I play through the game? I already have a twitch set up, and I'd like to give it some use and interact with people, so I'm not rambling nonsense through the whole vid