add missing indonesian language

i18n/languages.json

@@ -66,6 +66,7 @@
     "ie": ["Interlingue", "Interlingue"],
     "ga": ["Gaeilge", "Irish"],
     "ig": ["Asụsụ Igbo", "Igbo"],
+    "in": ["bahasa Indonesia","Indonesian"],
     "ik": ["Iñupiaq", "Inupiaq"],
     "io": ["Ido", "Ido"],
     "is": ["Íslenska", "Icelandic"],