fix: fix typos and iso encoding lang format

Author: sumn2u

LANGS.md

@@ -77,12 +77,12 @@
             "text": "Français"
           },
           {
-            "config": "ne",
+            "config": "np",
             "text": "नेपाली"
           },
           {
             "config": "tr",
-            "text": "Turkish"
+            "text": "Türkiye"
           }
         ]
       }

book.json

@@ -67,8 +67,16 @@
           "text": "English"
         },
         {
-          "config": "ne",
+          "config": "fr",
+          "text": "Français"
+        },
+        {
+          "config": "np",
           "text": "नेपाली"
+        },
+        {
+          "config": "tr",
+          "text": "Türkiye"
         }
       ]
     }

fr/README.md

@@ -68,12 +68,16 @@
             "text": "English"
           },
           {
-            "config": "ne",
+            "config": "fr",
+            "text": "Français"
+          },
+          {
+            "config": "np",
             "text": "नेपाली"
           },
           {
             "config": "tr",
-            "text": "Turkish"
+            "text": "Türkiye"
           }
         ]
       }