[en][faq] add flags

locale/en/translations.suml

@@ -293,6 +293,17 @@ faq:
                     Nonbinary folks can use binary pronouns, some lesbians use {/he=he/him} for cultural reasons, etc.
                 - >
                     Simply say “pronouns”.
+        add-flags:
+            question: 'My flag is not in the editor. Can you add it?'
+            answer:
+                - >
+                    To avoid potential vandalisms (flags of attack helicopters, MAPs, TERFs, etc.)
+                    we've decided not to allow uploading your own pictures to the flags editor.
+                    But we do offer a choice from a pretty long list of more popular flags
+                    – unfortunately that requires us to make a subjective choice.
+                - >
+                    You can try using the closest matching flag you identify with instead.
+                    And in the “description” field you can just write anything you want.
 
 links:
     header: 'Links'