Another bachelorette party question LOL

So I had a bbq this weekend for my bday with my friends and FH's friends. A lot of his friends have g/fs that I really like. One I see a decent amount when I go out with FH. She started talking about then she gets engaged to her b/f how she will be going to Vegas for her bachelorette party and how I have to go with her. I dont think she has a lot of girlfriends and I was like of course I would go! So then I asked her to come to mine (I had been thinking about it for a while and figured it was a good time). We arent close close friends but I see her enough in group situations and really like her. The only problem is that there is a tiny language barier...she is Dominican and speaks English pretty perfectly and understands it great but doesnt completely understand how some customs work here. So she was like awww I would love to go but she wanted to know if she could invite a friend of hers since she doesnt know my other friend. So now I dunno what to do. Should I just say its okay to bring the other friend? Not invite her anymore? I'm not quite sure how to handle the situation. TIA.

I thought about inviting another one of FH's girlfriends but I just dont feel close enough to any of them to really ask them. I see and talk to this girl when we go out and she is also the best mans b/f so it's a bit different.

I'd let her bring the friend too. The more the merrier!