Depends on the country. That's about as good a responce as your question can get.
In Germany, pay is very similar to what it is here, but there is very limited demand AND the US degree isn't worth much because it is drastically different from German degree. You need to know German too.
In fact, I can't think of a European country where you can sit for licensure withouth additional education and knowing the local language. In the UK, it's relatively easy since it is English (though it's a bit different kind of English 😀) and you would only need a year or two of coursework before being eligible for licensure there.
I know that US degree is accepted in a number of Middle Eastern countries - Saudi Arabia, I think, possibly Lebanon and Egypt, but I can't vouch for them. I knew a lady who worked in Saudi Arabia with her US degree, but I have no idea about the pay.