AnsibleError: template error while templating string: expected token ':', got '}'

An error occurs when preparing the template. Who can tell you how to fix it?

Variables, if necessary, can also be edited.

  vars:
    AllСountry:
         - "name1"
         - "name2"
    name1:
         - "region1a"  
         - "region1b"   
    name2:
         - "region2a"
         - "region2b"

Code

{% for country in AllСountry %}   
{name: "{{ country }}",{% for count in {{ country }} %}My country = {{ count }}
{% endfor %}{% endfor %}

the result is an error

AnsibleError: template error while templating string: expected token ':', got '}'

Yes in the end I expect to get the output of the entire list from

name: "name1  My country = "region1a" My country = "region1b"   
name: "name2: My country = "region2a" My country = "region2b"

This happens because you are nesting a expression delimiter {{ in a statement delimiter {% in Jinja here:

{% for count in {{ country }} %}
{#              ^--- right there #}

In order to achieve what you are looking to do, you can use the vars lookup.

Given the task:

- debug: 
    msg: >
      {% for country in AllCountry %}   
      {name: "{{ country }}",{% for count in lookup('vars', country) %}My country = {{ count }}
      {% endfor %}{% endfor %}
  vars:
    AllCountry:
      - name1
      - name2
    name1:
      - region1a
      - region1b 
    name2:
      - region2a
      - region2b

This yields:

ok: [localhost] => 
  msg: |2-
     {name: "name1",My country = region1a My country = region1b  {name: "name2",My country = region2a My country = region2b