Jews live in other places as well. Such as in South Africa, where even the President of the country until about 6 years ago, had more than one wife. And in Morocco Jews still live and some Moroccan Yidden have more than one. Iran as well. Jews lived in Egypt, Syria, Lebanon and Iraq until about 15 years ago, which are additional examples where it is legal under secular law.
Even in the United States it is legal if you don’t apply for secular marriage license and stick only to Kedushin and Chupa. The Mormon Fundamentalist do it openly. The Utah Attorney General tried to challenge it in court in the 1950s, but the courts ruled they couldn’t interfere with religious marriages if all the parties were legal adults and no minors were involved. Many African immigrants living in New York immigrated in the last 20 years to the US with multiple wives.