diff --git a/src/EditorFeatures/Core/Extensibility/Completion/CompletionHelper.cs b/src/EditorFeatures/Core/Extensibility/Completion/CompletionHelper.cs
index 59b413f86292157f1754f0e72563969f893b1995..a9556b09a1b9f4255601efb425a090fd3986d4f8 100644
--- a/src/EditorFeatures/Core/Extensibility/Completion/CompletionHelper.cs
+++ b/src/EditorFeatures/Core/Extensibility/Completion/CompletionHelper.cs
@@ -117,8 +117,8 @@ protected static bool IsAllDigits(string filterText)
 
         protected PatternMatch? GetMatch(CompletionItem item, string filterText, bool includeMatchSpans)
         {
-            var patternMatcher = this.GetPatternMatcher(GetCultureSpecificQuirks(filterText), CultureInfo.CurrentCulture);
-            var match = patternMatcher.GetFirstMatch(GetCultureSpecificQuirks(item.FilterText), includeMatchSpans);
+            var patternMatcher = this.GetPatternMatcher(filterText, CultureInfo.CurrentCulture);
+            var match = patternMatcher.GetFirstMatch(item.FilterText, includeMatchSpans);
 
             if (match != null)
             {
@@ -128,8 +128,8 @@ protected static bool IsAllDigits(string filterText)
             // Start with the culture-specific comparison, and fall back to en-US.
             if (!CultureInfo.CurrentCulture.Equals(EnUSCultureInfo))
             {
-                patternMatcher = this.GetFallbackPatternMatcher(GetCultureSpecificQuirks(filterText));
-                match = patternMatcher.GetFirstMatch(GetCultureSpecificQuirks(item.FilterText));
+                patternMatcher = this.GetEnUSPatternMatcher(filterText);
+                match = patternMatcher.GetFirstMatch(item.FilterText);
                 if (match != null)
                 {
                     return match;
@@ -139,52 +139,37 @@ protected static bool IsAllDigits(string filterText)
             return null;
         }
 
-        /// <summary>
-        /// Apply any culture-specific quirks to the given text for the purposes of pattern matching.
-        /// For example, in the Turkish locale, capital 'i's should be treated specially in Visual Basic.
-        /// </summary>
-        protected virtual string GetCultureSpecificQuirks(string candidate)
-        {
-            return candidate;
-        }
-
         private readonly object _gate = new object();
         private readonly Dictionary<string, PatternMatcher> _patternMatcherMap = new Dictionary<string, PatternMatcher>();
         private readonly Dictionary<string, PatternMatcher> _fallbackPatternMatcherMap = new Dictionary<string, PatternMatcher>();
         internal static readonly CultureInfo EnUSCultureInfo = new CultureInfo("en-US");
 
-        protected PatternMatcher GetPatternMatcher(string value, CultureInfo culture)
+        private PatternMatcher GetPatternMatcher(
+            string value, CultureInfo culture, Dictionary<string, PatternMatcher> map)
         {
             lock (_gate)
             {
                 PatternMatcher patternMatcher;
-                if (!_patternMatcherMap.TryGetValue(value, out patternMatcher))
+                if (!map.TryGetValue(value, out patternMatcher))
                 {
-                    patternMatcher = new PatternMatcher(value, culture, 
-                        verbatimIdentifierPrefixIsWordCharacter: true, 
+                    patternMatcher = new PatternMatcher(value, culture,
+                        verbatimIdentifierPrefixIsWordCharacter: true,
                         allowFuzzyMatching: false);
-                    _patternMatcherMap.Add(value, patternMatcher);
+                    map.Add(value, patternMatcher);
                 }
 
                 return patternMatcher;
             }
         }
 
-        private PatternMatcher GetFallbackPatternMatcher(string value)
+        protected PatternMatcher GetPatternMatcher(string value, CultureInfo culture)
         {
-            lock (_gate)
-            {
-                PatternMatcher patternMatcher;
-                if (!_fallbackPatternMatcherMap.TryGetValue(value, out patternMatcher))
-                {
-                    patternMatcher = new PatternMatcher(
-                        value, EnUSCultureInfo, verbatimIdentifierPrefixIsWordCharacter: true,
-                        allowFuzzyMatching: false);
-                    _fallbackPatternMatcherMap.Add(value, patternMatcher);
-                }
+            return GetPatternMatcher(value, culture, _patternMatcherMap);
+        }
 
-                return patternMatcher;
-            }
+        private PatternMatcher GetEnUSPatternMatcher(string value)
+        {
+            return GetPatternMatcher(value, EnUSCultureInfo, _fallbackPatternMatcherMap);
         }
 
         /// <summary>
@@ -193,8 +178,8 @@ private PatternMatcher GetFallbackPatternMatcher(string value)
         /// </summary>
         public virtual bool IsBetterFilterMatch(CompletionItem item1, CompletionItem item2, string filterText, CompletionTrigger trigger, CompletionFilterReason filterReason, ImmutableArray<string> recentItems = default(ImmutableArray<string>))
         {
-            var match1 = GetMatch(item1, GetCultureSpecificQuirks(filterText));
-            var match2 = GetMatch(item2, GetCultureSpecificQuirks(filterText));
+            var match1 = GetMatch(item1, filterText);
+            var match2 = GetMatch(item2, filterText);
 
             if (match1 != null && match2 != null)
             {
diff --git a/src/EditorFeatures/VisualBasic/Completion/VisualBasicCompletionHelper.vb b/src/EditorFeatures/VisualBasic/Completion/VisualBasicCompletionHelper.vb
index 5924ec733076d7c72886a173e07d47318d569444..3001a51d45f6b96b61548373519be31f4b4318f2 100644
--- a/src/EditorFeatures/VisualBasic/Completion/VisualBasicCompletionHelper.vb
+++ b/src/EditorFeatures/VisualBasic/Completion/VisualBasicCompletionHelper.vb
@@ -52,15 +52,6 @@ Namespace Microsoft.CodeAnalysis.Editor.VisualBasic.Completion
             Return MyBase.MatchesFilterText(item, filterText, trigger, filterReason, recentItems)
         End Function
 
-        Protected Overrides Function GetCultureSpecificQuirks(candidate As String) As String
-            ' TODO: define way to identify this case w/o language specific check
-            If CultureInfo.CurrentCulture.Name = "tr-TR" Then
-                Return candidate.Replace("I"c, "İ"c)
-            End If
-
-            Return candidate
-        End Function
-
         Public Overrides Function IsBetterFilterMatch(item1 As CompletionItem, item2 As CompletionItem, filterText As String, trigger As CompletionTrigger, filterReason As CompletionFilterReason, Optional recentItems As ImmutableArray(Of String) = Nothing) As Boolean
 
             If filterReason = CompletionFilterReason.BackspaceOrDelete Then