Translations

In Drupal 8 Commerce 2.0 order item titles are saved in customer's language. This creates a huge problem in the admin interface (/admin/commerce/orders/*) when the contents of the order are listed in e.g. Chinese, Japanese or Arabic letters which the staff is uneducated of and therefore they are unable to process the order. What would be the easiest and the most user-friendly solution to show the contents of order (order item titles) in any language the admin chooses?

I try to save the translation in a content that I have created and the content type is customized, it is called programs but it shows an error:

I am using drupal 8.5

Handbook drupal 9? does it exist ? where can I order such book? 

I've seen many people with this problem in several forums an threads, but can't find information on how to solve this.

The problem is that some fields in menu links are not translatable (others like title or description are):

Trying to translate menu links

I can't see the way to add link as translatable in regional -> content-language:

Custom menu link translation options in regional content-language.

Randomly, translated content is showing a 404 page.
Also, unable to access translated content in Admin content listing view, it's redirecting to default the English language on clicking edit.

The wrong URL is being generated in the edit for e.g

1. Italian(langcode - "it") =>  /in/ode/[nid]/edit
2. Nepali(langcode - "ne") =>  /in/ode/[nid]/edit

I have faced the above issue for Italian and Nepali language so far, unable to understand what's wrong with these two languages.

Hello,

I installed Drupal 9.0.2 using the recommended Composer template, setting the default Language to German. Nevertheless I tend to find the English labels more to the point at lot of times. However, when trying to download the respective translation files (for more than 50 projects!), they are not found. I wonder what I am missing...

Thanks for any hints
H. Stoellinger