How to train a model to do QnA - other than English language?

Please help me - point me to resources where I can learn –
How to train a model to understand a paragraph in different language
Train to answer questions

I tested a couple of models.-- but they are not working.
It looks that I need to train the model…but I don’t know how to.

If you want to perform QnA tasks in other languages, you have to either use a multilingual model or use the pretrained models trained on your target language. See this post for more information.

How do I best find a model for a particular language on Hugging Face? For example for portuguese I have found for “Sentence Textual Similarity”

But beside testing the models myself, what are the indicators which model works best for a particular downstream NLP task like for example “Sentence Textual Similarity”?