I imagine this had a lot to do with it, because otherwise, you two were totally unsuited to each other.
When you can't even communicate without the support of technology, it is a dead end. I say that as someone who also lives abroad and has learned the local language. It is otherwise impossible to have a functional relationship. Add to that the fact that she kept rejecting your advances, and the writing has been on the wall for a long time.
Perhaps you were also at a more vulnerable or lonely point when you met her too, so she seemed like a reasonable option because nothing else was really happening. But this was never a very realistic prospect. Best to have walked away, and keep it that way.