diff --git a/src/FsAutoComplete.Core/TipFormatter.fs b/src/FsAutoComplete.Core/TipFormatter.fs
index ffc2bfeb3..e2b90eca6 100644
--- a/src/FsAutoComplete.Core/TipFormatter.fs
+++ b/src/FsAutoComplete.Core/TipFormatter.fs
@@ -890,6 +890,26 @@ let rec private readXmlDoc (reader: XmlReader) (indentationSize: int) (acc: Map<
 let private xmlDocCache =
   Collections.Concurrent.ConcurrentDictionary<string, Map<string, XmlDocMember>>()
 
+let private findCultures v =
+  let rec loop state (v: System.Globalization.CultureInfo) =
+    let state' = v.Name :: state
+
+    if v.Parent = System.Globalization.CultureInfo.InvariantCulture then
+      "" :: state' |> List.rev
+    else
+      loop state' v.Parent
+
+  loop [] v
+
+let private findLocalizedXmlFile (xmlFile: string) =
+  let xmlName = Path.GetFileName xmlFile
+  let path = Path.GetDirectoryName xmlFile
+
+  findCultures System.Globalization.CultureInfo.CurrentUICulture
+  |> List.map (fun culture -> Path.Combine(path, culture, xmlName))
+  |> List.tryFind (fun i -> File.Exists i)
+  |> Option.defaultValue xmlFile
+
 let private getXmlDoc dllFile =
   let xmlFile = Path.ChangeExtension(dllFile, ".xml")
   //Workaround for netstandard.dll
@@ -903,6 +923,8 @@ let private getXmlDoc dllFile =
     else
       xmlFile
 
+  let xmlFile = findLocalizedXmlFile xmlFile
+
   if xmlDocCache.ContainsKey xmlFile then
     Some xmlDocCache.[xmlFile]
   else
diff --git a/src/FsAutoComplete/CodeFixes.fs b/src/FsAutoComplete/CodeFixes.fs
index 77ac654bb..3c11fdd3c 100644
--- a/src/FsAutoComplete/CodeFixes.fs
+++ b/src/FsAutoComplete/CodeFixes.fs
@@ -326,6 +326,9 @@ module Run =
   let ifDiagnosticByMessage (checkMessage: string) handler : CodeFix =
     runDiagnostics (fun d -> d.Message.Contains checkMessage) handler
 
+  let ifDiagnosticByCheckMessage (checkMessageFunc: (string -> bool) list) handler : CodeFix =
+    runDiagnostics (fun d -> checkMessageFunc |> List.exists (fun f -> f d.Message)) handler
+
   let ifDiagnosticByType (diagnosticType: string) handler : CodeFix =
     runDiagnostics
       (fun d ->
diff --git a/src/FsAutoComplete/CodeFixes.fsi b/src/FsAutoComplete/CodeFixes.fsi
index fd300841f..1a8366bbe 100644
--- a/src/FsAutoComplete/CodeFixes.fsi
+++ b/src/FsAutoComplete/CodeFixes.fsi
@@ -162,6 +162,11 @@ module Run =
     handler: (Diagnostic -> CodeActionParams -> Async<Result<Fix list, string>>) ->
       (CodeActionParams -> Async<Result<Fix list, string>>)
 
+  val ifDiagnosticByCheckMessage:
+    checkMessageFunc: (string -> bool) list ->
+    handler: (Diagnostic -> CodeActionParams -> Async<Result<Fix list, string>>) ->
+      (CodeActionParams -> Async<Result<Fix list, string>>)
+
   val ifDiagnosticByType:
     diagnosticType: string ->
     handler: (Diagnostic -> CodeActionParams -> Async<Result<Fix list, string>>) ->
diff --git a/src/FsAutoComplete/CodeFixes/ReplaceWithSuggestion.fs b/src/FsAutoComplete/CodeFixes/ReplaceWithSuggestion.fs
index afe8615e8..e1ec606bc 100644
--- a/src/FsAutoComplete/CodeFixes/ReplaceWithSuggestion.fs
+++ b/src/FsAutoComplete/CodeFixes/ReplaceWithSuggestion.fs
@@ -8,10 +8,27 @@ open FSharp.Compiler.Syntax
 
 let title suggestion = $"Replace with '%s{suggestion}'"
 
+let undefinedName =
+  [ "Maybe you want one of the following:"
+    "Možná budete potřebovat něco z tohoto:"
+    "Vielleicht möchten Sie eine der folgenden Bezeichnungen verwenden:"
+    "Puede elegir una de las opciones siguientes:"
+    "Peut-être souhaitez-vous l'une des options suivantes :"
+    "Si può specificare uno dei nomi seguenti:"
+    "次のいずれかの可能性はありませんか:"
+    "다음 중 하나가 필요할 수 있습니다:"
+    "Możliwe, że chcesz wykonać jedną z następujących czynności:"
+    "Talvez você queira um dos seguintes:"
+    "Возможно, требуется одно из следующих:"
+    "Aşağıdakilerden birini arıyor olabilirsiniz:"
+    "你可能需要以下之一:"
+    "您可能需要下列其中一項:" ]
+  |> List.map (fun i -> fun (j: string) -> j.Contains(i, System.StringComparison.Ordinal))
+
 /// a codefix that replaces the use of an unknown identifier with a suggested identifier
 let fix =
-  Run.ifDiagnosticByMessage "Maybe you want one of the following:" (fun diagnostic codeActionParams ->
-    diagnostic.Message.Split('\n').[1..]
+  Run.ifDiagnosticByCheckMessage undefinedName (fun diagnostic codeActionParams ->
+    diagnostic.Message.Split('\n', '\u001b').[1..]
     |> Array.map (fun suggestion ->
       let suggestion = suggestion.Trim() |> PrettyNaming.NormalizeIdentifierBackticks
 
diff --git a/src/FsAutoComplete/CodeFixes/ResolveNamespace.fs b/src/FsAutoComplete/CodeFixes/ResolveNamespace.fs
index f8b59b266..5f1fd243e 100644
--- a/src/FsAutoComplete/CodeFixes/ResolveNamespace.fs
+++ b/src/FsAutoComplete/CodeFixes/ResolveNamespace.fs
@@ -8,9 +8,29 @@ open FsAutoComplete.LspHelpers
 open FsAutoComplete
 open FSharp.Compiler.Text
 open FSharp.Compiler.EditorServices
+open System.Text.RegularExpressions
 
 type LineText = string
 
+let undefinedName =
+  [ "not define"
+    "nedefinuje|Není definovaný|Není definované|Není definovaná|Nemáte definovaný"
+    "definiert nicht|nicht.*? definiert"
+    "no define|no está definido|no está definida"
+    "ne définit|n'est pas défini"
+    "non definisce|non è definito|non è definita"
+    "定義(され|し)ていません"
+    "정의(하지 않|되지 않았|되어 있지 않)습니다"
+    "nie definiuje|Nie zdefiniowano|nie jest zdefiniowany"
+    "não define|não está definido"
+    "не определяет|не определено|не определены|не определен"
+    "tanımlamıyor|tanımlı değil"
+    "未.*?定义"
+    "未定義" ]
+  |> List.map (fun i ->
+    let regex = Regex(i, RegexOptions.IgnoreCase ||| RegexOptions.Compiled)
+    fun (j: string) -> regex.IsMatch(j))
+
 /// a codefix the provides suggestions for opening modules or using qualified names when an identifier is found that needs qualification
 let fix
   (getParseResultsForFile: GetParseResultsForFile)
@@ -112,7 +132,7 @@ let fix
       Title = $"open %s{actualOpen}"
       Kind = FixKind.Fix }
 
-  Run.ifDiagnosticByMessage "is not defined" (fun diagnostic codeActionParameter ->
+  Run.ifDiagnosticByCheckMessage undefinedName (fun diagnostic codeActionParameter ->
     asyncResult {
       let pos = protocolPosToPos diagnostic.Range.Start