Add translation validation git hook

- Create validate-translations.js script to check all translation keys exist in all locales
- Add translation validation to pre-commit hook
- Validates that es, en, ca translation files have matching keys
- Blocks commits if translations are missing or inconsistent
- Prevents incomplete translations from being committed

.githooks/pre-commit

@@ -36,6 +36,19 @@ else
     fi
 fi
 
+echo ""
+echo "🔍 Validating translation files..."
+
+# Check if any translation files are staged
+if git diff --cached --name-only | grep -q "frontend/locales/"; then
+    # Run translation validation
+    if ! node scripts/validate-translations.js; then
+        exit 1
+    fi
+else
+    echo "✓ No translation files staged, skipping validation"
+fi
+
 echo ""
 echo "✅ All pre-commit checks passed"
 

scripts/validate-translations.js

@@ -0,0 +1,151 @@
+#!/usr/bin/env node
+/**
+ * Translation validation script
+ * Ensures all translation keys exist in all three language files (es, en, ca)
+ */
+
+const fs = require("fs");
+const path = require("path");
+
+const LOCALES_DIR = path.join(__dirname, "..", "frontend", "locales");
+const LOCALES = ["es", "en", "ca"];
+const NAMESPACES = [
+  "admin",
+  "auth",
+  "common",
+  "exchange",
+  "invites",
+  "navigation",
+  "profile",
+  "trades",
+];
+
+/**
+ * Get all keys from a nested object recursively
+ */
+function getAllKeys(obj, prefix = "") {
+  const keys = [];
+  for (const [key, value] of Object.entries(obj)) {
+    const fullKey = prefix ? `${prefix}.${key}` : key;
+    if (typeof value === "object" && value !== null && !Array.isArray(value)) {
+      keys.push(...getAllKeys(value, fullKey));
+    } else {
+      keys.push(fullKey);
+    }
+  }
+  return keys;
+}
+
+/**
+ * Check if a key exists in an object (supports nested keys like "a.b.c")
+ */
+function hasKey(obj, keyPath) {
+  const parts = keyPath.split(".");
+  let current = obj;
+  for (const part of parts) {
+    if (current === null || current === undefined || typeof current !== "object") {
+      return false;
+    }
+    if (!(part in current)) {
+      return false;
+    }
+    current = current[part];
+  }
+  return true;
+}
+
+/**
+ * Validate a single namespace across all locales
+ */
+function validateNamespace(namespace) {
+  const translations = {};
+  const missingKeys = {};
+
+  // Load all locale files for this namespace
+  for (const locale of LOCALES) {
+    const filePath = path.join(LOCALES_DIR, locale, `${namespace}.json`);
+    if (!fs.existsSync(filePath)) {
+      console.error(`❌ Missing file: ${filePath}`);
+      return false;
+    }
+
+    try {
+      const content = fs.readFileSync(filePath, "utf8");
+      translations[locale] = JSON.parse(content);
+    } catch (error) {
+      console.error(`❌ Error parsing ${filePath}: ${error.message}`);
+      return false;
+    }
+  }
+
+  // Get all keys from Spanish (default) as the reference
+  const referenceKeys = getAllKeys(translations.es);
+  missingKeys.es = [];
+
+  // Check each locale has all keys
+  for (const locale of LOCALES) {
+    missingKeys[locale] = [];
+    for (const key of referenceKeys) {
+      if (!hasKey(translations[locale], key)) {
+        missingKeys[locale].push(key);
+      }
+    }
+  }
+
+  // Check if any locale is missing keys
+  let hasErrors = false;
+  for (const locale of LOCALES) {
+    if (missingKeys[locale].length > 0) {
+      hasErrors = true;
+      console.error(`\n❌ ${namespace}.json - Missing keys in ${locale}:`);
+      for (const key of missingKeys[locale]) {
+        console.error(`   - ${key}`);
+      }
+    }
+  }
+
+  // Check for extra keys in other locales (keys that don't exist in Spanish)
+  for (const locale of LOCALES) {
+    if (locale === "es") continue;
+    const localeKeys = getAllKeys(translations[locale]);
+    const extraKeys = localeKeys.filter((key) => !hasKey(translations.es, key));
+    if (extraKeys.length > 0) {
+      hasErrors = true;
+      console.error(`\n❌ ${namespace}.json - Extra keys in ${locale} (not in Spanish):`);
+      for (const key of extraKeys) {
+        console.error(`   - ${key}`);
+      }
+    }
+  }
+
+  return !hasErrors;
+}
+
+/**
+ * Main validation function
+ */
+function validateTranslations() {
+  console.log("🔍 Validating translation files...\n");
+
+  let allValid = true;
+
+  for (const namespace of NAMESPACES) {
+    if (!validateNamespace(namespace)) {
+      allValid = false;
+    }
+  }
+
+  if (!allValid) {
+    console.error("\n❌ Translation validation failed!");
+    console.error("   All translation keys must exist in all three language files (es, en, ca)");
+    console.error("   To skip this check (not recommended): git commit --no-verify");
+    process.exit(1);
+  }
+
+  console.log("✅ All translation files are valid");
+  return true;
+}
+
+// Run validation
+validateTranslations();
+