Unicode Script Code (ISO 15924) Regex for Go

What this pattern does

This page provides a lightweight, single-purpose regular expression for matching unicode script code (iso 15924), ported and verified for Go. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your Go project — whether you're validating in a Gin handler, a gRPC service, or a command-line tool.

Go Implementation

// Unicode Script Code (ISO 15924)
// ReDoS-safe | RegexVault — Localization > Locale & Language

package validation

import "regexp"

var unicodeScriptCodeIso15924Re = regexp.MustCompile(`^[A-Z][a-z]{3}$`)

func ValidateUnicodeScriptCodeIso15924(s string) bool {
    return unicodeScriptCodeIso15924Re.MatchString(s)
}

// Example
// fmt.Println(ValidateUnicodeScriptCodeIso15924("Latn")) // true

Test Cases

When to use this pattern

This pattern is drawn from the Localization > Locale & Language category and carries a ReDoS-safe certification. That matters for Go developers because Go's RE2 engine is inherently safe from catastrophic backtracking, but this pattern has been additionally verified for correctness. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

ISO 15924 script codes: Latn=Latin, Hans=Simplified Chinese, Hant=Traditional Chinese, Arab=Arabic, Cyrl=Cyrillic, Deva=Devanagari (Hindi), Hang=Hangul, Jpan=Japanese (Han+Hiragana+Katakana). Used in BCP 47 language tags.