feat: add translations to feed

Author: maelle

themes/ropensci/layouts/blog/list.json.json

@@ -36,12 +36,16 @@
 				"content_html": {{ .Content | replaceRE "\n" "" | jsonify }},
 				"url": "{{ .Permalink }}",
 				"date_published": "{{ .Date.Format "2006-01-02T15:04:05-07:00" | safeHTML }}",
-				{{ with .Params.crossposts }}
-				"_relationships": [{{ range $index, $element := . }}
+				{{ if (or (isset .Params "crossposts") .IsTranslated) }}
+				"_relationships": [				{{ if (isset .Params "crossposts") }}{{ range $index, $element := .Params.crossposts }}{{ if $index }},{{end}}
 				{
       "url": "{{ .url }}",
       "title": "{{ .name }}",
-      "relation": "IsIdenticalTo"}{{ if $index}},{{end}}{{ end }} ]
+      "relation": "IsIdenticalTo"}{{ end }}{{ end }} {{ if .IsTranslated }}{{ if (isset .Params "crossposts") }},{{ end }}{{ range $index, $element := .Translations }}{{ if $index }},{{end}}
+				{
+      "url": "{{ .Permalink }}",
+      "title": "{{ .Title }}",
+      "relation": "IsTranslationOf"}{{ end }}{{ end }}]
 ,{{ end }}
 				"date_modified": "{{ .Lastmod.Format "2006-01-02T15:04:05-07:00" | safeHTML }}"
 			}