diff --git a/YesNt.Interpreter/Attributes/StatementAttribute.cs b/YesNt.Interpreter/Attributes/StatementAttribute.cs
index 6f8f543..9aded1f 100644
--- a/YesNt.Interpreter/Attributes/StatementAttribute.cs
+++ b/YesNt.Interpreter/Attributes/StatementAttribute.cs
@@ -26,7 +26,7 @@ public class StatementAttribute : Attribute
     /// <summary>Gets which sides of the keyword must be padded with a space.</summary>
     public SpaceAround SpaceAround { get; }
 
-    /// <summary>Gets or sets the syntax-highlight colour used by the code editor.</summary>
+    /// <summary>Gets or sets the syntax-highlight color used by the code editor.</summary>
     public ConsoleColor Color { get; set; }
 
     /// <summary>
@@ -61,12 +61,12 @@ public class StatementAttribute : Attribute
     public string Separator { get; set; }
 
     /// <summary>
-    /// Initialises a new <see cref="StatementAttribute"/> with a syntax-highlight colour.
+    /// Initializes a new <see cref="StatementAttribute"/> with a syntax-highlight color.
     /// </summary>
     /// <param name="name">The keyword that identifies this statement.</param>
     /// <param name="searchMode">Where in the line the keyword is matched.</param>
     /// <param name="spaceAround">Which sides of the keyword require a surrounding space.</param>
-    /// <param name="color">The colour used for syntax highlighting in the code editor.</param>
+    /// <param name="color">The color used for syntax highlighting in the code editor.</param>
     public StatementAttribute(string name, SearchMode searchMode, SpaceAround spaceAround, ConsoleColor color)
     {
         Name = name;
@@ -76,7 +76,7 @@ public class StatementAttribute : Attribute
     }
 
     /// <summary>
-    /// Initialises a new <see cref="StatementAttribute"/> without a syntax-highlight colour.
+    /// Initializes a new <see cref="StatementAttribute"/> without a syntax-highlight color.
     /// The statement will be excluded from syntax highlighting.
     /// </summary>
     /// <param name="name">The keyword that identifies this statement.</param>
diff --git a/YesNt.Interpreter/Runtime/StatementInformation.cs b/YesNt.Interpreter/Runtime/StatementInformation.cs
index e08f4a6..5e522b1 100644
--- a/YesNt.Interpreter/Runtime/StatementInformation.cs
+++ b/YesNt.Interpreter/Runtime/StatementInformation.cs
@@ -19,7 +19,7 @@ public class StatementInformation
     /// <summary>Gets which sides of the keyword must be padded with a space.</summary>
     public SpaceAround SpaceAround { get; internal set; }
 
-    /// <summary>Gets the syntax-highlight colour for this statement.</summary>
+    /// <summary>Gets the syntax-highlight color for this statement.</summary>
     public ConsoleColor Color { get; internal set; }
 
     /// <summary>
diff --git a/YesNt.Interpreter/Runtime/YesNtInterpreter.cs b/YesNt.Interpreter/Runtime/YesNtInterpreter.cs
index f9d719d..6f06dac 100644
--- a/YesNt.Interpreter/Runtime/YesNtInterpreter.cs
+++ b/YesNt.Interpreter/Runtime/YesNtInterpreter.cs
@@ -105,7 +105,7 @@ public class YesNtInterpreter
     }
 
     /// <summary>
-    /// Registers a custom statement without a syntax-highlight colour.
+    /// Registers a custom statement without a syntax-highlight color.
     /// </summary>
     /// <param name="name">The keyword that identifies this statement in source code.</param>
     /// <param name="searchMode">Where in the line the keyword is matched.</param>
@@ -117,12 +117,12 @@ public class YesNtInterpreter
     }
 
     /// <summary>
-    /// Registers a custom statement with a syntax-highlight colour.
+    /// Registers a custom statement with a syntax-highlight color.
     /// </summary>
     /// <param name="name">The keyword that identifies this statement in source code.</param>
     /// <param name="searchMode">Where in the line the keyword is matched.</param>
     /// <param name="spaceAround">Which sides of the keyword require a surrounding space.</param>
-    /// <param name="consoleColor">The colour used for syntax highlighting in the code editor.</param>
+    /// <param name="consoleColor">The color used for syntax highlighting in the code editor.</param>
     /// <param name="handler">The delegate invoked when the statement matches.</param>
     public void AddStatement(string name, SearchMode searchMode, SpaceAround spaceAround, ConsoleColor consoleColor, Action<string> handler)
     {
@@ -147,7 +147,7 @@ public class YesNtInterpreter
     /// <summary>
     /// Disables all statements matching <paramref name="name"/> by replacing their handlers with
     /// a no-op. The keyword still matches (so no "Invalid statement" error is raised), but the
-    /// statement has no effect. Use <see cref="EnableStatement"/> to restore original behaviour.
+    /// statement has no effect. Use <see cref="EnableStatement"/> to restore original behavior.
     /// </summary>
     /// <param name="name">The keyword of the statement(s) to disable.</param>
     public void DisableStatement(string name)
diff --git a/YesNt.Interpreter/Utilities/Evaluator.cs b/YesNt.Interpreter/Utilities/Evaluator.cs
index 339e1b5..2aad718 100644
--- a/YesNt.Interpreter/Utilities/Evaluator.cs
+++ b/YesNt.Interpreter/Utilities/Evaluator.cs
@@ -15,7 +15,7 @@ internal static partial class Evaluator
     /// <param name="input">The condition expression, which may contain safe-string encoded values.</param>
     /// <returns>
     /// <see langword="true"/> or <see langword="false"/> if the condition could be evaluated;
-    /// <see langword="null"/> if the expression is not a recognised condition form (treated as an error by callers).
+    /// <see langword="null"/> if the expression is not a recognized condition form (treated as an error by callers).
     /// </returns>
     public static bool? EvaluateCondition(string input)
     {
@@ -83,7 +83,7 @@ internal static partial class Evaluator
     /// Evaluates a numeric arithmetic expression string and returns the result as a string.
     /// Supports <c>+</c>, <c>-</c>, <c>*</c>, <c>/</c>, <c>%</c> (modulo), and <c>^</c> (power) operators
     /// with standard precedence (<c>^</c> highest, <c>+</c>/<c>-</c> lowest) and parentheses.
-    /// Adjacent sign characters (<c>++</c>, <c>--</c>, <c>-+</c>, <c>+-</c>) are normalised before evaluation.
+    /// Adjacent sign characters (<c>++</c>, <c>--</c>, <c>-+</c>, <c>+-</c>) are normalized before evaluation.
     /// </summary>
     /// <param name="input">The arithmetic expression to evaluate.</param>
     /// <returns>The result as a culture-invariant numeric string, or <c>"NaN"</c> if evaluation failed.</returns>