I do the same. I don't trust myself to not make a typo or a mistake. Even with CSS, I will rarely write more than a class without checking the result. Because debugging is hard.
It goes the same for websites. I used to have my blog on a tumblr subdomain until I wanted to move it to my own domain and hosting. You just can't do a 301 on a tumblr post.
The tab join looks weird(aesthetically) and the separator is too thin. I want one side in focus. But all these things have to do with taste. The screenshot you attached looks probably great to you, but I prefer the side by side windows.
The separator of TotalFinder and Xtrafinder is just too thin. I want to see right away which side is in focus. When you click on one of the two windows the other one becomes washed and is also covered by the shadow of the active one.
Try starting a company. You'll probably have to have some money to start, but I'm guessing that's not a problem.
Look for other americans on forums. They should know the drill.
Look for an authorized translator. Born in US. She can probably advise you the best.
Search for a way to get an extension. Even if that means you have to go back to US for a couple of months. If the girl is serious she should still be in Denmark 3 months later.