Multilingual App & Website Development

I am building a single product that works everywhere: a responsive website plus a companion mobile app, each able to translate content into 54 languages. Spanish, Chinese, and French are non-negotiable starting points, and the remaining languages will follow the same integration pattern... (Budget: $2 - $1000 USD, Jobs: Android, iOS Development, iPhone, Mobile App Development, PHP, Translation, Vue.js, Web Development)