Tweak translation issue form

.github/ISSUE_TEMPLATE/translation.yaml

@@ -25,7 +25,7 @@ body:
   - type: dropdown
     attributes:
       label: Volunteer
-      description: Are you a native speaker of this language and willing to contribute a translation map?
+      description: Are you a fluent speaker of this language **and** willing to contribute a translation map?
       options:
         - "Yes"
         - "No"