Wouldn't it be possible to prove machines could understand the concepts (not just the symbols) but teaching it 2 different languages and pass the concepts throu

Wouldn't it be possible to prove machines could understand the concepts (not just the symbols) but teaching it 2 different languages and pass the concepts through one and ask for explanations of them through the other? If the AI was just taught the relationship between the letters of each language and never the translation between them, the only way to explain the concept would be to understand them no?