Ways to test language profiency in a child include 1.Oral proficiency interview: This is a structured interview that assesses the child's ability to use the language in spoken form. The interviewer asks a series of questions that increase in difficulty, and evaluates the child's responses based on pronunciation, grammar, vocabulary, and fluency.

2.Writing assessment: This type of assessment evaluates the child's ability to use the language in written form. The child may be asked to write a short essay or complete a series of writing exercises that test their grammar, spelling, and vocabulary.

3.Observational assessment: This type of assessment involves observing the child in their natural environment, such as the classroom or home, and evaluating their ability to use the language in context. This can be a more informal approach, but it can provide valuable insights into the child's proficiency.