When any ¹[Indian Christians] is married under the provisions of this Part, the person solemnizing the marriage shall ascertain whether such ¹[Indian Christians] understands the English language, and, if he does not, the person solemnizing the marriage shall, at the time of the solemnization, translate, or cause to be translated, to such ¹[Indian Christians], into a language which he understands, the declarations made at such marriage in accordance with the provisions of this Act.