adds french & fixes translation issues

web/src/lib/i18n/locales/en.json

@@ -7,6 +7,7 @@
   "added-trail-to": "Added trail to",
   "alphabetical": "Alphabetical",
   "already-account": "Already have an account?",
+  "altitude": "Altitude",
   "avatar": "Avatar",
   "basic-info": "Basic Info",
   "cancel": "Cancel",
@@ -16,6 +17,7 @@
   "change": "Change",
   "changelog": "Changelog",
   "completed": "Completed",
+  "completion-status": "Completion Status",
   "contribute": "Contribute",
   "create-new-list": "Create new list",
   "creation-date": "Creation date",
@@ -52,6 +54,7 @@
   "explore": "Explore",
   "explore-some-trails": "Explore some trails",
   "features": "Features",
+  "french": "French",
   "german": "German",
   "hero_section_0_text": "Explore exciting trails, save your favorites, and experience the beauty of nature. Find your next adventure!",
   "hero_section_1_heading": "It seems there are no trails here yet.",
@@ -60,6 +63,7 @@
   "hero_section_2_text": "Did you know? You cannot only save you hiking trails. There are many categories for all your adventures.",
   "icon": "Icon",
   "imperial": "Imperial",
+  "invalid-date": "Invalid Date",
   "invalid-username": "Invalid username",
   "language": "Language",
   "latitude": "Latitude",