"They are American."
Translation:Wao ni Wamarekani.
technically 'wao ni Wamarekani' translates to 'they are Americans', but there's no specific adjective for nationalities in Swahili, in that the Swahili word always translates to 'people of (whatever country)'.
In general the stem '-marekani' translates to 'of America/American (adj)', and will always need a prefix, depending on the subject noun. '
Mmarekani' means 'American person', while '
kimarekani' means 'of America/American (adj)', and only applies to inanimate objects or intangible things, e.g. 'American culture' would be 'Utamaduni wa