diff --git a/pkg/enum/maps.go b/pkg/enum/bool.go
similarity index 52%
rename from pkg/enum/maps.go
rename to pkg/enum/bool.go
index e2c7c2fc1..4ce15e38d 100644
--- a/pkg/enum/maps.go
+++ b/pkg/enum/bool.go
@@ -1,6 +1,15 @@
 package enum
 
-// YesMap map to represent Yes in the following languages Czech, Danish, Dutch, English, French, German, Indonesian, Italian, Polish, Portuguese, Russian, Ukrainian.
+// True and False specify boolean string representations.
+const (
+	True  = "true"
+	False = "false"
+)
+
+// YesMap enumerates lower-case tokens we accept as an affirmative answer across
+// supported languages (Czech, Danish, Dutch, English, French, German,
+// Indonesian, Italian, Polish, Portuguese, Russian, Ukrainian). Callers should
+// trim and lowercase input before performing lookups.
 var YesMap = map[string]struct{}{
 	"1":        {},
 	"yes":      {},
@@ -12,6 +21,7 @@ var YesMap = map[string]struct{}{
 	"ja":       {},
 	"oui":      {},
 	"si":       {},
+	"sí":       {},
 	"tak":      {},
 	"sim":      {},
 	"да":       {},
@@ -19,7 +29,9 @@ var YesMap = map[string]struct{}{
 	"так":      {},
 }
 
-// NoMap map to represent No in the following languages Czech, Danish, Dutch, English, French, German, Indonesian, Italian, Polish, Portuguese, Russian, Ukrainian.
+// NoMap enumerates lower-case tokens we accept as a negative answer across the
+// same set of supported languages. Callers should trim and lowercase input
+// before performing lookups.
 var NoMap = map[string]struct{}{
 	"0":        {},
 	"no":       {},
diff --git a/pkg/enum/enum.go b/pkg/enum/enum.go
index 614faa210..d0b20a92c 100644
--- a/pkg/enum/enum.go
+++ b/pkg/enum/enum.go
@@ -1,5 +1,6 @@
 /*
-Package enum provides declarations of enum.
+Package enum centralizes canonical string constants and lookup tables that we
+use when interpreting enumerations throughout PhotoPrism.
 
 Copyright (c) 2018 - 2025 PhotoPrism UG. All rights reserved.
 
diff --git a/pkg/enum/strings.go b/pkg/enum/strings.go
deleted file mode 100644
index e8ddb4660..000000000
--- a/pkg/enum/strings.go
+++ /dev/null
@@ -1,7 +0,0 @@
-package enum
-
-// True and False specify boolean string representations.
-const (
-	True  = "true"
-	False = "false"
-)
diff --git a/pkg/list/strings.go b/pkg/list/strings.go
index 1c68c96e6..b74f86295 100644
--- a/pkg/list/strings.go
+++ b/pkg/list/strings.go
@@ -1,6 +1,8 @@
 package list
 
-import "github.com/photoprism/photoprism/pkg/enum"
+import (
+	"github.com/photoprism/photoprism/pkg/enum"
+)
 
 // StringLengthLimit specifies the maximum length of string return values.
 var StringLengthLimit = 767
diff --git a/pkg/txt/bool.go b/pkg/txt/bool.go
deleted file mode 100644
index 46bd6fee7..000000000
--- a/pkg/txt/bool.go
+++ /dev/null
@@ -1,56 +0,0 @@
-package txt
-
-import (
-	"strings"
-
-	"github.com/photoprism/photoprism/pkg/enum"
-)
-
-// Bool casts a string to bool.
-func Bool(s string) bool {
-	s = strings.TrimSpace(s)
-
-	if s == "" || No(s) {
-		return false
-	}
-
-	return true
-}
-
-// Yes tests if a string represents "yes" in the following languages Czech, Danish, Dutch, English, French, German, Indonesian, Italian, Polish, Portuguese, Russian, Ukrainian.
-func Yes(s string) (result bool) {
-	t := strings.ToLower(strings.TrimSpace(s))
-	if t == "" {
-		return false
-	} else if strings.Contains(t, " ") {
-		result = false
-	} else {
-
-		_, result = enum.YesMap[t]
-	}
-	return result
-}
-
-// No tests if a string represents "no"  in the following languages Czech, Danish, Dutch, English, French, German, Indonesian, Italian, Polish, Portuguese, Russian, Ukrainian.
-func No(s string) (result bool) {
-	t := strings.ToLower(strings.TrimSpace(s))
-	if t == "" {
-		return false
-	} else if strings.Contains(t, " ") {
-		result = false
-	} else {
-		_, result = enum.NoMap[t]
-	}
-	return result
-}
-
-// New tests if a string represents "new".
-func New(s string) bool {
-	if s == "" {
-		return false
-	}
-
-	s = strings.ToLower(strings.TrimSpace(s))
-
-	return s == EnNew
-}
diff --git a/pkg/txt/const.go b/pkg/txt/const.go
new file mode 100644
index 000000000..66cfddcca
--- /dev/null
+++ b/pkg/txt/const.go
@@ -0,0 +1,21 @@
+package txt
+
+import (
+	"github.com/photoprism/photoprism/pkg/enum"
+)
+
+// True and False specify boolean string representations.
+const (
+	True  = enum.True
+	False = enum.False
+)
+
+// Additional english language strings.
+const (
+	EnOr   = "or"
+	EnAnd  = "and"
+	EnWith = "with"
+	EnIn   = "in"
+	EnAt   = "at"
+	EnNew  = "new"
+)
diff --git a/pkg/txt/en.go b/pkg/txt/en.go
deleted file mode 100644
index f567baff7..000000000
--- a/pkg/txt/en.go
+++ /dev/null
@@ -1,10 +0,0 @@
-package txt
-
-const (
-	EnOr   = "or"
-	EnAnd  = "and"
-	EnWith = "with"
-	EnIn   = "in"
-	EnAt   = "at"
-	EnNew  = "new"
-)
diff --git a/pkg/txt/match.go b/pkg/txt/match.go
new file mode 100644
index 000000000..7efa375a4
--- /dev/null
+++ b/pkg/txt/match.go
@@ -0,0 +1,57 @@
+package txt
+
+import (
+	"strings"
+	"unicode"
+
+	"github.com/photoprism/photoprism/pkg/enum"
+)
+
+// New tests if a string represents "new".
+func New(s string) bool {
+	if s == "" {
+		return false
+	}
+
+	s = strings.ToLower(strings.TrimSpace(s))
+
+	return s == EnNew
+}
+
+// Bool casts a string to bool by treating any non-empty value that is not a
+// known negative token as true.
+func Bool(s string) bool {
+	s = strings.TrimSpace(s)
+
+	if s == "" || No(s) {
+		return false
+	}
+
+	return true
+}
+
+// Yes reports whether s matches a supported affirmative token in the languages
+// represented by enum.YesMap.
+func Yes(s string) bool {
+	return matchEnumToken(enum.YesMap, s)
+}
+
+// No reports whether s matches a supported negative token in the languages
+// represented by enum.NoMap.
+func No(s string) bool {
+	return matchEnumToken(enum.NoMap, s)
+}
+
+// matchEnumToken normalizes s and checks whether it exists in tokens.
+func matchEnumToken(tokens map[string]struct{}, s string) bool {
+	t := strings.ToLower(strings.TrimSpace(s))
+	if t == "" {
+		return false
+	}
+	if strings.IndexFunc(t, unicode.IsSpace) >= 0 {
+		return false
+	}
+
+	_, ok := tokens[t]
+	return ok
+}
diff --git a/pkg/txt/bool_test.go b/pkg/txt/match_test.go
similarity index 91%
rename from pkg/txt/bool_test.go
rename to pkg/txt/match_test.go
index 40c0f9bc6..63cdf7e13 100644
--- a/pkg/txt/bool_test.go
+++ b/pkg/txt/match_test.go
@@ -6,6 +6,30 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
+func TestNew(t *testing.T) {
+	t.Run("Empty", func(t *testing.T) {
+		assert.False(t, New(""))
+	})
+	t.Run("EnNew", func(t *testing.T) {
+		assert.True(t, New(EnNew))
+	})
+	t.Run("Spaces", func(t *testing.T) {
+		assert.True(t, New("     new "))
+	})
+	t.Run("Uppercase", func(t *testing.T) {
+		assert.True(t, New("NEW"))
+	})
+	t.Run("Lowercase", func(t *testing.T) {
+		assert.True(t, New("new"))
+	})
+	t.Run("True", func(t *testing.T) {
+		assert.True(t, New("New"))
+	})
+	t.Run("False", func(t *testing.T) {
+		assert.False(t, New("non"))
+	})
+}
+
 func TestBool(t *testing.T) {
 	t.Run("NotEmpty", func(t *testing.T) {
 		assert.True(t, Bool("Browse your life in pictures"))
@@ -34,6 +58,9 @@ func TestBool(t *testing.T) {
 	t.Run("Empty", func(t *testing.T) {
 		assert.False(t, Bool(""))
 	})
+	t.Run("UppercaseNo", func(t *testing.T) {
+		assert.False(t, Bool("NO"))
+	})
 }
 
 func TestYes(t *testing.T) {
@@ -98,6 +125,12 @@ func TestYes(t *testing.T) {
 		assert.True(t, Yes("да"))
 		assert.True(t, Yes("Да"))
 	})
+	t.Run("TabSeparatedPhrase", func(t *testing.T) {
+		assert.False(t, Yes("yes\tplease"))
+	})
+	t.Run("NonBreakingSpace", func(t *testing.T) {
+		assert.False(t, Yes("yes\u00a0please"))
+	})
 }
 
 func TestNo(t *testing.T) {
@@ -181,28 +214,10 @@ func TestNo(t *testing.T) {
 	t.Run("Nein", func(t *testing.T) {
 		assert.True(t, No("nein"))
 	})
-}
-
-func TestNew(t *testing.T) {
-	t.Run("Empty", func(t *testing.T) {
-		assert.False(t, New(""))
+	t.Run("TabSeparatedPhrase", func(t *testing.T) {
+		assert.False(t, No("no\tthanks"))
 	})
-	t.Run("EnNew", func(t *testing.T) {
-		assert.True(t, New(EnNew))
-	})
-	t.Run("Spaces", func(t *testing.T) {
-		assert.True(t, New("     new "))
-	})
-	t.Run("Uppercase", func(t *testing.T) {
-		assert.True(t, New("NEW"))
-	})
-	t.Run("Lowercase", func(t *testing.T) {
-		assert.True(t, New("new"))
-	})
-	t.Run("True", func(t *testing.T) {
-		assert.True(t, New("New"))
-	})
-	t.Run("False", func(t *testing.T) {
-		assert.False(t, New("non"))
+	t.Run("NonBreakingSpace", func(t *testing.T) {
+		assert.True(t, No("нет\u00a0"))
 	})
 }