What should I do in this case?

What should I do in this case?

I’m inquiring several times, but it’s a shopping mall problem currently in production.
But there’s something really strange.

I tested what kind of translation language is the problem.
It was impossible to translate Italian, Japanese, Russian, and Korean in my shopping mall.
On the other hand, English, Chinese, French, and Vietnamese could be translated.

If you change to italian, japanese, Russian, and Korean and enter the detailed view product page, you will not see the product page.
With English, Chinese, French, and Vietnamese, the detailed view page of the product looked completely.
What’s the difference?

Of course, you can see everything well in the basic theme, but you can’t use it to create a shopping mall.

Are there any differences between these languages?
Is the code that you call in and receive in JSON differently?

It’s strange that some languages are visible and some languages are invisible.
Test it yourself.
I’ll leave the URL address below.
It is the same product page address.

What I found is the image below.
Like the error message in the console window, when Json is called in, a syntax error occurs and data is not received.
Please answer my questions.

disabled
https://plusmall.net/it/prodotto/fashionable-womens-original-trucker/
https://plusmall.net/ru/product/fashionable-womens-original-trucker/
https://plusmall.net/ja/product/fashionable-womens-original-trucker/
https://plusmall.net/ko/product/fashionable-womens-original-trucker/

Enabled
https://plusmall.net/en/product/fashionable-womens-original-trucker/
https://plusmall.net/zh/product/fashionable-womens-original-trucker/
https://plusmall.net/fr/produit/fashionable-womens-original-trucker/
https://plusmall.net/vi/san-pham/fashionable-womens-original-trucker/

https://ibb.co/Ltq1LwQ