diff --git a/packages/dev/optimize-locales-plugin/LocalesPlugin.js b/packages/dev/optimize-locales-plugin/LocalesPlugin.js
index 49b0557e435..310bfbe9c09 100644
--- a/packages/dev/optimize-locales-plugin/LocalesPlugin.js
+++ b/packages/dev/optimize-locales-plugin/LocalesPlugin.js
@@ -12,6 +12,10 @@
 const {createUnplugin} = require('unplugin');
 const path = require('path');
 
+const localeSpecifierRegex = /[a-z]{2}-[A-Z]{2}/;
+const sourcePathRegex =
+  /[/\\](@react-stately|@react-aria|@react-spectrum|@adobe[/\\]react-spectrum|react-stately|react-aria|react-aria-components)[/\\]/;
+
 module.exports = createUnplugin(({locales}) => {
   locales = locales.map(l => new Intl.Locale(l));
   return {
@@ -19,25 +23,25 @@ module.exports = createUnplugin(({locales}) => {
     vite: {
       enforce: 'pre'
     },
-    resolveId(specifier, sourcePath, options) {
-      if (
-        !/[/\\](@react-stately|@react-aria|@react-spectrum|@adobe[/\\]react-spectrum|react-stately|react-aria|react-aria-components)[/\\]/.test(
-          sourcePath
-        ) ||
-        options?.ssr
-      ) {
-        return;
-      }
+    resolveId: {
+      filter: {
+        id: localeSpecifierRegex
+      },
+      handler(specifier, sourcePath, options) {
+        if (!sourcePathRegex.test(sourcePath) || options?.ssr) {
+          return;
+        }
 
-      let match = specifier.match(/[a-z]{2}-[A-Z]{2}/);
-      if (match) {
-        let locale = new Intl.Locale(match[0]);
-        if (!locales.some(l => localeMatches(locale, l))) {
-          return path.join(__dirname, 'empty.js');
+        let match = specifier.match(localeSpecifierRegex);
+        if (match) {
+          let locale = new Intl.Locale(match[0]);
+          if (!locales.some(l => localeMatches(locale, l))) {
+            return path.join(__dirname, 'empty.js');
+          }
         }
-      }
 
-      return null;
+        return null;
+      }
     }
   };
 });
diff --git a/packages/dev/optimize-locales-plugin/test/LocalesPlugin.test.js b/packages/dev/optimize-locales-plugin/test/LocalesPlugin.test.js
index 5493361ef74..a872b990db3 100644
--- a/packages/dev/optimize-locales-plugin/test/LocalesPlugin.test.js
+++ b/packages/dev/optimize-locales-plugin/test/LocalesPlugin.test.js
@@ -22,7 +22,18 @@ function fakeImporter(pkgName) {
   return `/repo/node_modules/${pkgName}/dist/intlStrings.mjs`;
 }
 
+function resolveId(plugin, ...args) {
+  return plugin.resolveId.handler(...args);
+}
+
 describe('@react-aria/optimize-locales-plugin', () => {
+  test('resolveId filters locale-looking specifiers', () => {
+    const plugin = createPlugin(['en-US']);
+
+    expect(plugin.resolveId.filter.id.test('./fr-FR.json')).toBe(true);
+    expect(plugin.resolveId.filter.id.test('./helpers')).toBe(false);
+  });
+
   describe('resolveId redirects non-included locales to empty.js for', () => {
     const cases = [
       ['@react-stately/combobox', fakeImporter('@react-stately/combobox')],
@@ -36,7 +47,7 @@ describe('@react-aria/optimize-locales-plugin', () => {
 
     test.each(cases)('importer under %s', (_label, sourcePath) => {
       const plugin = createPlugin(['en-US']);
-      const resolved = plugin.resolveId('./fr-FR.json', sourcePath, {});
+      const resolved = resolveId(plugin, './fr-FR.json', sourcePath, {});
       expect(resolved).toBe(EMPTY_JS);
     });
   });
@@ -44,32 +55,32 @@ describe('@react-aria/optimize-locales-plugin', () => {
   describe('resolveId leaves things alone when', () => {
     test('importer is outside React Spectrum / React Aria scopes', () => {
       const plugin = createPlugin(['en-US']);
-      const resolved = plugin.resolveId('./fr-FR.json', fakeImporter('some-other-pkg'), {});
+      const resolved = resolveId(plugin, './fr-FR.json', fakeImporter('some-other-pkg'), {});
       expect(resolved).toBeUndefined();
     });
 
     test('specifier targets an included locale', () => {
       const plugin = createPlugin(['en-US', 'fr-FR']);
-      const resolved = plugin.resolveId('./fr-FR.json', fakeImporter('@adobe/react-spectrum'), {});
+      const resolved = resolveId(plugin, './fr-FR.json', fakeImporter('@adobe/react-spectrum'), {});
       expect(resolved).toBeNull();
     });
 
     test('specifier targets a regional locale whose language is included without a region', () => {
       // Including a bare language ("fr") should keep every regional variant.
       const plugin = createPlugin(['en-US', 'fr']);
-      const resolved = plugin.resolveId('./fr-CA.json', fakeImporter('@react-aria/button'), {});
+      const resolved = resolveId(plugin, './fr-CA.json', fakeImporter('@react-aria/button'), {});
       expect(resolved).toBeNull();
     });
 
     test('specifier does not look like a locale', () => {
       const plugin = createPlugin(['en-US']);
-      const resolved = plugin.resolveId('./helpers', fakeImporter('@adobe/react-spectrum'), {});
+      const resolved = resolveId(plugin, './helpers', fakeImporter('@adobe/react-spectrum'), {});
       expect(resolved).toBeNull();
     });
 
     test('options.ssr is true', () => {
       const plugin = createPlugin(['en-US']);
-      const resolved = plugin.resolveId('./fr-FR.json', fakeImporter('@adobe/react-spectrum'), {
+      const resolved = resolveId(plugin, './fr-FR.json', fakeImporter('@adobe/react-spectrum'), {
         ssr: true
       });
       expect(resolved).toBeUndefined();
@@ -79,7 +90,7 @@ describe('@react-aria/optimize-locales-plugin', () => {
   test('handles Windows-style importer paths', () => {
     const plugin = createPlugin(['en-US']);
     const windowsImporter = 'C:\\repo\\node_modules\\@adobe\\react-spectrum\\dist\\intlStrings.mjs';
-    const resolved = plugin.resolveId('./fr-FR.json', windowsImporter, {});
+    const resolved = resolveId(plugin, './fr-FR.json', windowsImporter, {});
     expect(resolved).toBe(EMPTY_JS);
   });
 });