I would notify a possible bug, the product name in return request email template not working correctly and show the prodcut name only in english (Standard lang).
The effected email template: NewReturnRequest.CustomerNotification
The effected Token name: %ReturnRequest.Product.Name%
The store languages: English, Arabic >> Arabic token for the product name not working.
The store nop version: 4.30
To me, it seems that the possible bug is that the MessageTokenProvider does not resolve a localized product name:
var product = _productService.GetProductById(orderItem.ProductId);
tokens.Add(new Token("ReturnRequest.Product.Name", product.Name));
whereas other services (e.g. PDFService) would lookup the localized product name
var name = await _localizationService.GetLocalizedAsync(product, x => x.Name, lang.Id);
As a test, check that your product does have a Name value on the first tab, and try again.