I know what you mean. When my wife and I were a young couple we moved from where my family lives, Denver, to San Francisco. We lived there 5 years and never found lasting friends. There were a few people we knew, but no one to "hang" with.

It does get lonely.

Then we move to Portland, Oregon and have been here for nearly 25 years. I have managed to find two lasting friendships.

It must be so much harder moving to a place with a different language and culture. I can't imagine.

Is there an US expat community there?

I don't know. Some of these things are hard to figure out.