It should say "Amerika Sāmoa", with the macron. BTW, you can type macrons on iOS and Android keyboards (not just for the Tongan, Māori and Hawaiian keyboards, but also on the standard English keyboard, I use the Australian English keyboard and I can type all the Polynesian and Aboriginal diacritics plus most of the European ones). You can also install a keyboard for Windows or Mac with the macrons Ā, Ē, Ī, Ō, Ū, ā, ē, ī, ō, ū. You can also get the ‘okina if you have a Tongan, Māori and/or Hawaiian keyboard. Considering you translate into Tongan, I think this will help you a bit.
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It should say "Amerika Sāmoa", with the macron. BTW, you can type macrons on iOS and Android keyboards (not just for the Tongan, Māori and Hawaiian keyboards, but also on the standard English keyboard, I use the Australian English keyboard and I can type all the Polynesian and Aboriginal diacritics plus most of the European ones). You can also install a keyboard for Windows or Mac with the macrons Ā, Ē, Ī, Ō, Ū, ā, ē, ī, ō, ū. You can also get the ‘okina if you have a Tongan, Māori and/or Hawaiian keyboard. Considering you translate into Tongan, I think this will help you a bit.