Yes, Portugal and Canada both allow multiple citizenship.
It depends on the countries they want to be a citizen of; whether they allow multiple citizenship or not. For example, one can have British, Canadian, America, Australian and Italian citizenship at the same time because all allow multiple citizenship. But, if the same person wants to become a German citizen, they must give up all five before doing so.
Yes you can. the UK and the US both allow multiple citizenship
Yes, there is. Both countries allow dual nationality.
The United States does not formally recognize or allow triple citizenship. U.S. citizenship can be acquired through birth within the territory or through naturalization, but the U.S. government does not regulate or restrict the acquisition of additional citizenships by U.S. citizens. However, individuals with multiple citizenships are still required to comply with U.S. laws and regulations while in the country.
India does not allow dual citizenship.
Yes, Thailand allows dual citizenship.
Yes dual citizenship is allowed for US citizens.
Unfortunately Spain does not allow dual citizenship. If you are a US citizen, you should give up your Spanish nationality otherwise you will face penalties.
Yes, it does.
Yes, both countries allow dual citizenship. However, if you live more than ten years outside Ireland, you will lose your Irish citizenship.
Dual citizenship has been allowed in Brazil since 1994.