Translate frontend/src/i18n/en.json in es

68% of minimum 60% translated source file: 'frontend/src/i18n/en.json'
on 'es'.

Sync of partially translated files: 
untranslated content is included with an empty translation 
or source language content depending on file format

Author: transifex-integration[bot]

frontend/src/i18n/es.json

@@ -9,6 +9,11 @@
   "settings_theme": "Theme",
   "settings_language": "Idioma",
   "settings_status": "Show status as",
+  "settings_image_view": "Show images in list",
+  "image_view_image": "Image (faster)",
+  "image_view_obverse": "Anverso",
+  "image_view_reverse": "Reverso",
+  "image_view_both": "Ambos",
   "wrong_version": "El archivo tiene un formato erróneo o desconocido",
   "too_old_version": "File has an too old version. Please update it with desktop version of OpenNumismat",
   "old_version": "El archivo es de una versión antigua. Por favor, actualícelo con la versión de escritorio de OpenNumismat",