Polished issue template

.github/ISSUE_TEMPLATE/translate.yml

@@ -1,17 +1,26 @@
 name: Translate
-description: 'Help translate Material into more languages'
-title: 'New translation: {Insert language}'
-labels: [enhancement]
+description: Add localization for a new language
+title: 'New language: {replace with language name}'
 body:
-- type: markdown
+  - type: checkboxes
     attributes:
+      label: Contribution guidelines
+      description: Please read the contribution guidelines before proceeding.
+      options:
+        - label: I've read the [contribution guidelines](https://github.com/squidfunk/mkdocs-material/blob/master/CONTRIBUTING.md) and wholeheartedly agree
+          required: true
+  - type: checkboxes
+    attributes:
+      label: Language availability
+      description: Please ensure that the language you're adding isn't already available
+      options:
+        - label: I've checked the [list of available languages](https://bit.ly/33vFDD0)
+          required: true
+  - type: textarea
+    attributes:
+      label: Translation
+      description: Please translate the labels on the right, e.h. "Copy to clipboard", etc.
       value: |-
-      ## Instructions
-      
-      1. Check, if your language is already available: [here](https://bit.ly/33vFDD0)
-      2. If it isn't, please translate the labels on the right:
-      
-      ```jinja
         {% macro t(key) %}{{ {
           "language": "en",
           "direction": "ltr",
@@ -48,17 +57,6 @@ body:
           "toc.title": "Table of contents",
           "top.title": "Back to top"
         }[key] }}{% endmacro %}
-      ```
-- type: textarea
-  attributes:
-    label: Translation
-    description: Put your translated file here. The text is automatically formatted as Jinja code
-    placeholder: |-
-      {% macro t(key) %}{{ {
-        "language": "en",
-        "direction": "ltr",
-        ...
-      }[key] }}{% endmacro %}
       render: jinja
     validations:
       required: true