How can I set auto language and currency for different domains?

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As a last resort im reaching out here. For the last 6 days i have been talking to support chat on shopify with no results. My issue is this, i have 1 domain for both sweden and usa. I want the usa page to auto show in english and dollars and in sweden it should be in swedish and swedish currency. I have translated already with app it took about 7h. But still when people log on to the usa market it shows up in swedish. U guys are my last hope the im changing e-plattform.