Just a heads up. Constantly seeing this in my logs

[Oxide] 22:32 [Error] Failed to call hook 'Hover' on plugin 'HelicopterHover v1.1.9' (JsonReaderException: After parsing a value an unexpected character was encountered: .. Path 'Mounted', line 4, position 87.)
  at Newtonsoft.Json.JsonTextReader.ParsePostValue () [0x00179] in <7126fb4f5c5b40029458a4f975f98d13>:0 
  at Newtonsoft.Json.JsonTextReader.Read () [0x0005a] in <7126fb4f5c5b40029458a4f975f98d13>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateDictionary (System.Collections.IDictionary dictionary, Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonDictionaryContract contract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, System.String id) [0x0028b] in <7126fb4f5c5b40029458a4f975f98d13>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x002a8] in <7126fb4f5c5b40029458a4f975f98d13>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x0006d] in <7126fb4f5c5b40029458a4f975f98d13>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Boolean checkAdditionalContent) [0x000d9] in <7126fb4f5c5b40029458a4f975f98d13>:0 
  at Newtonsoft.Json.JsonSerializer.DeserializeInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00053] in <7126fb4f5c5b40029458a4f975f98d13>:0 
  at Newtonsoft.Json.JsonSerializer.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00000] in <7126fb4f5c5b40029458a4f975f98d13>:0 
  at Newtonsoft.Json.JsonConvert.DeserializeObject (System.String value, System.Type type, Newtonsoft.Json.JsonSerializerSettings settings) [0x0002d] in <7126fb4f5c5b40029458a4f975f98d13>:0 
  at Newtonsoft.Json.JsonConvert.DeserializeObject[T] (System.String value, Newtonsoft.Json.JsonSerializerSettings settings) [0x00000] in <7126fb4f5c5b40029458a4f975f98d13>:0 
  at Newtonsoft.Json.JsonConvert.DeserializeObject[T] (System.String value) [0x00000] in <7126fb4f5c5b40029458a4f975f98d13>:0 
  at Oxide.Core.Libraries.Lang.GetMessageFile (System.String plugin, System.String lang) [0x00067] in :0 
  at Oxide.Core.Libraries.Lang.GetMessageKey (System.String key, Oxide.Core.Plugins.Plugin plugin, System.String lang) [0x00036] in :0 
  at Oxide.Core.Libraries.Lang.GetMessage (System.String key, Oxide.Core.Plugins.Plugin plugin, System.String userId) [0x00017] in :0 
  at Oxide.Plugins.HelicopterHover.ToggleHover (BasePlayer player, MiniCopter minicopter) [0x0011d] in :0 
  at Oxide.Plugins.HelicopterHover.Hover (BasePlayer player) [0x001bf] in :0 
  at Oxide.Plugins.HelicopterHover.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x000d2] in :0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in :0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in :0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in :0 

This error indicates that your oxide/lang file for the plugin is invalid. Make sure you've edited it correctly and it is valid JSON.