Using String Catalog for Word Iteration/Partial Translation

I want to make use of String Catalog for some words that show the differences between countries like the USA and Canada.

For example, I added both languages to my string catalog and I would like to have:

  • Enter your Zip Code [English]
  • Enter your Providence [English (Canada)]

If I run the app without any change in the tables, I see all values shown correctly, but when I make this 1 word change in required field, all other strings start showing their keys instead of base values that are already in English language.

What is the easiest way to achieve this using String Catalogs other than copy/pasting all the values from English table to English (Canada) table?

I don't want to or need to translate all the strings in the catalog since they are literally the same, all I need is having iterations for some words.