Multi-quiz multi language app, how to design json translation files?

I am designing an react ionic app having multi quizzes with multiple questions and with multiple answers to choose from in multi-language ? which internationalization library should I choose, all the examples I see are simple key:pair value translations in one location but my structure is some thing like this below, how do I basically load based on the language the user choose and the quiz ?

{
  "quiz": {
    "id": "QZ-1",
    "language": "en",
    "title": "Personality Check",
    "version": "1.0",
    "questions": [
      {
        "question": "Are you 30 years old and above ?",
        "answers": [
          {
            "answer": "Yes"
          },
          {
            "answer": "No"
          },
        ]
      },
      {
        "question": "Are you a male ?",
        "answers": [
          {
            "answer": "Yes"
          },
          {
            "answer": "No"
          }
        ]
      },
    ]
  }
}