feat(no-unlocalized-strings): skip strings without any letters

- Numeric/symbolic strings like "1,00€", "100%", "12:30" are technical
- Uses Unicode \p{L} to detect letters (supports umlauts, accents, etc.)

Author: swernerx

src/rules/no-unlocalized-strings.test.ts

@@ -127,6 +127,19 @@ ruleTester.run("no-unlocalized-strings", noUnlocalizedStrings, {
     { code: 'const sep = "-"', filename: "test.tsx" },
     { code: 'const x = "."', filename: "test.tsx" },
 
+    // Numeric/symbolic strings (no letters at all)
+    { code: 'const x = "1000"', filename: "test.tsx" },
+    { code: 'const x = "1.000"', filename: "test.tsx" },
+    { code: 'const x = "1,00"', filename: "test.tsx" },
+    { code: 'const x = "1,00€"', filename: "test.tsx" },
+    { code: 'const x = "€100"', filename: "test.tsx" },
+    { code: 'const x = "1,00 2,00 3,00"', filename: "test.tsx" },
+    { code: 'const x = "100%"', filename: "test.tsx" },
+    { code: 'const x = "$99.99"', filename: "test.tsx" },
+    { code: 'const x = "12:30"', filename: "test.tsx" },
+    { code: 'const x = "2024-01-15"', filename: "test.tsx" },
+    { code: 'const x = "→ ← ↑ ↓"', filename: "test.tsx" },
+
     // Empty strings
     { code: 'const x = ""', filename: "test.tsx" },
     { code: 'const x = "   "', filename: "test.tsx" },

src/rules/no-unlocalized-strings.ts

@@ -288,6 +288,11 @@ function looksLikeUIString(value: string): boolean {
     return true
   }
 
+  // No letters at all - likely numeric/symbolic (e.g., "1,00€", "1.000", "100%")
+  if (!/\p{L}/u.test(trimmed)) {
+    return false
+  }
+
   // Contains letters AND spaces - likely a phrase or sentence
   if (/[a-zA-Z]/.test(trimmed) && /\s/.test(trimmed)) {
     return true