diff --git a/.changeset/swift-bananas-know.md b/.changeset/swift-bananas-know.md
new file mode 100644
index 000000000..08250e3dd
--- /dev/null
+++ b/.changeset/swift-bananas-know.md
@@ -0,0 +1,5 @@
+---
+'@lion/ui': patch
+---
+
+validate-messages without side effects
diff --git a/packages/ui/components/validate-messages/src/loadDefaultFeedbackMessages.js b/packages/ui/components/validate-messages/src/loadDefaultFeedbackMessages.js
index b8b246c3e..873336d8f 100644
--- a/packages/ui/components/validate-messages/src/loadDefaultFeedbackMessages.js
+++ b/packages/ui/components/validate-messages/src/loadDefaultFeedbackMessages.js
@@ -1,190 +1,11 @@
 /* eslint-disable import/no-extraneous-dependencies */
 import { localize } from '@lion/ui/localize.js';
-import {
-  DefaultSuccess,
-  IsDate,
-  IsDateDisabled,
-  MaxDate,
-  MinDate,
-  MinMaxDate,
-  IsNumber,
-  MaxNumber,
-  MinMaxNumber,
-  MinNumber,
-  Required,
-  EqualsLength,
-  IsEmail,
-  MaxLength,
-  MinLength,
-  MinMaxLength,
-  Pattern,
-} from '@lion/ui/form-core.js';
-import { PhoneNumber } from '@lion/ui/input-tel.js';
+import { loadDefaultFeedbackMessagesNoSideEffects } from './loadDefaultFeedbackMessagesNoSideEffects.js';
 
 /**
  * @typedef {import('../../form-core/types/validate/validate.js').FeedbackMessageData} FeedbackMessageData
  */
 
-let loaded = false;
-
 export function loadDefaultFeedbackMessages() {
-  if (loaded === true) {
-    return;
-  }
-
-  const forMessagesToBeReady = () =>
-    localize.loadNamespace(
-      {
-        'lion-validate': /** @param {string} locale */ locale => {
-          switch (locale) {
-            case 'bg-BG':
-              return import('@lion/ui/validate-messages-translations/bg-BG.js');
-            case 'bg':
-              return import('@lion/ui/validate-messages-translations/bg.js');
-            case 'cs-CZ':
-              return import('@lion/ui/validate-messages-translations/cs-CZ.js');
-            case 'cs':
-              return import('@lion/ui/validate-messages-translations/cs.js');
-            case 'de-DE':
-              return import('@lion/ui/validate-messages-translations/de-DE.js');
-            case 'de':
-              return import('@lion/ui/validate-messages-translations/de.js');
-            case 'en-AU':
-              return import('@lion/ui/validate-messages-translations/en-AU.js');
-            case 'en-GB':
-              return import('@lion/ui/validate-messages-translations/en-GB.js');
-            case 'en-US':
-              return import('@lion/ui/validate-messages-translations/en-US.js');
-            case 'en-PH':
-              return import('@lion/ui/validate-messages-translations/en-PH.js');
-            case 'en':
-              return import('@lion/ui/validate-messages-translations/en.js');
-            case 'es-ES':
-              return import('@lion/ui/validate-messages-translations/es-ES.js');
-            case 'es':
-              return import('@lion/ui/validate-messages-translations/es.js');
-            case 'fr-FR':
-              return import('@lion/ui/validate-messages-translations/fr-FR.js');
-            case 'fr-BE':
-              return import('@lion/ui/validate-messages-translations/fr-BE.js');
-            case 'fr':
-              return import('@lion/ui/validate-messages-translations/fr.js');
-            case 'hu-HU':
-              return import('@lion/ui/validate-messages-translations/hu-HU.js');
-            case 'hu':
-              return import('@lion/ui/validate-messages-translations/hu.js');
-            case 'it-IT':
-              return import('@lion/ui/validate-messages-translations/it-IT.js');
-            case 'it':
-              return import('@lion/ui/validate-messages-translations/it.js');
-            case 'nl-BE':
-              return import('@lion/ui/validate-messages-translations/nl-BE.js');
-            case 'nl-NL':
-              return import('@lion/ui/validate-messages-translations/nl-NL.js');
-            case 'nl':
-              return import('@lion/ui/validate-messages-translations/nl.js');
-            case 'pl-PL':
-              return import('@lion/ui/validate-messages-translations/pl-PL.js');
-            case 'pl':
-              return import('@lion/ui/validate-messages-translations/pl.js');
-            case 'ro-RO':
-              return import('@lion/ui/validate-messages-translations/ro-RO.js');
-            case 'ro':
-              return import('@lion/ui/validate-messages-translations/ro.js');
-            case 'ru-RU':
-              return import('@lion/ui/validate-messages-translations/ru-RU.js');
-            case 'ru':
-              return import('@lion/ui/validate-messages-translations/ru.js');
-            case 'sk-SK':
-              return import('@lion/ui/validate-messages-translations/sk-SK.js');
-            case 'sk':
-              return import('@lion/ui/validate-messages-translations/sk.js');
-            case 'uk-UA':
-              return import('@lion/ui/validate-messages-translations/uk-UA.js');
-            case 'uk':
-              return import('@lion/ui/validate-messages-translations/uk.js');
-            case 'zh-CN':
-            case 'zh':
-              return import('@lion/ui/validate-messages-translations/zh.js');
-            default:
-              return import('@lion/ui/validate-messages-translations/en.js');
-          }
-        },
-      },
-      { locale: localize.locale },
-    );
-
-  /**
-   * @param {FeedbackMessageData} data
-   * @returns {Promise<string|Element>}
-   */
-  const getLocalizedMessage = async data => {
-    await forMessagesToBeReady();
-    if (data) {
-      return localize.msg(`lion-validate:${data.type}.${data.name}`, data);
-    }
-    return '';
-  };
-
-  /** @param {FeedbackMessageData} data */
-  Required.getMessage = async data => getLocalizedMessage(data);
-  /** @param {FeedbackMessageData} data */
-  EqualsLength.getMessage = async data => getLocalizedMessage(data);
-  /** @param {FeedbackMessageData} data */
-  MinLength.getMessage = async data => getLocalizedMessage(data);
-  /** @param {FeedbackMessageData} data */
-  MaxLength.getMessage = async data => getLocalizedMessage(data);
-  /** @param {FeedbackMessageData} data */
-  MinMaxLength.getMessage = async data => getLocalizedMessage(data);
-  /** @param {FeedbackMessageData} data */
-  Pattern.getMessage = async data => getLocalizedMessage(data);
-  /** @param {FeedbackMessageData} data */
-  IsEmail.getMessage = async data => getLocalizedMessage(data);
-  /** @param {FeedbackMessageData} data */
-  IsNumber.getMessage = async data => getLocalizedMessage(data);
-  /** @param {FeedbackMessageData} data */
-  MinNumber.getMessage = async data => getLocalizedMessage(data);
-  /** @param {FeedbackMessageData} data */
-  MaxNumber.getMessage = async data => getLocalizedMessage(data);
-  /** @param {FeedbackMessageData} data */
-  MinMaxNumber.getMessage = async data => getLocalizedMessage(data);
-  /** @param {FeedbackMessageData} data */
-  IsDate.getMessage = async data => getLocalizedMessage(data);
-  /** @param {FeedbackMessageData} data */
-  MinDate.getMessage = async data => getLocalizedMessage(data);
-  /** @param {FeedbackMessageData} data */
-  MaxDate.getMessage = async data => getLocalizedMessage(data);
-  /** @param {FeedbackMessageData} data */
-  MinMaxDate.getMessage = async data => getLocalizedMessage(data);
-  /** @param {FeedbackMessageData} data */
-  IsDateDisabled.getMessage = async data => getLocalizedMessage(data);
-
-  DefaultSuccess.getMessage = async data => {
-    await forMessagesToBeReady();
-    const randomKeys = localize.msg('lion-validate:success.RandomOk').split(',');
-    const key = randomKeys[Math.floor(Math.random() * randomKeys.length)].trim();
-    return localize.msg(`lion-validate:${key}`, data);
-  };
-
-  /** @param {FeedbackMessageData} data */
-  // @ts-ignore
-  PhoneNumber.getMessage = async data => {
-    await forMessagesToBeReady();
-    const { type, outcome } = data;
-    if (outcome === 'too-long') {
-      // TODO: get max-length of country and use MaxLength validator
-      return localize.msg(`lion-validate:${type}.Pattern`, data);
-    }
-    if (outcome === 'too-short') {
-      // TODO: get min-length of country and use MinLength validator
-      return localize.msg(`lion-validate:${type}.Pattern`, data);
-    }
-    // TODO: add a more specific message here
-    if (outcome === 'invalid-country-code') {
-      return localize.msg(`lion-validate:${type}.Pattern`, data);
-    }
-    return localize.msg(`lion-validate:${type}.Pattern`, data);
-  };
-
-  loaded = true;
+  return loadDefaultFeedbackMessagesNoSideEffects({ localize });
 }
diff --git a/packages/ui/components/validate-messages/src/loadDefaultFeedbackMessagesNoSideEffects.js b/packages/ui/components/validate-messages/src/loadDefaultFeedbackMessagesNoSideEffects.js
new file mode 100644
index 000000000..b383cf939
--- /dev/null
+++ b/packages/ui/components/validate-messages/src/loadDefaultFeedbackMessagesNoSideEffects.js
@@ -0,0 +1,194 @@
+/* eslint-disable import/no-extraneous-dependencies */
+import {
+  DefaultSuccess,
+  IsDate,
+  IsDateDisabled,
+  MaxDate,
+  MinDate,
+  MinMaxDate,
+  IsNumber,
+  MaxNumber,
+  MinMaxNumber,
+  MinNumber,
+  Required,
+  EqualsLength,
+  IsEmail,
+  MaxLength,
+  MinLength,
+  MinMaxLength,
+  Pattern,
+} from '@lion/ui/form-core.js';
+import { PhoneNumber } from '@lion/ui/input-tel.js';
+
+/**
+ * @typedef {import('../../form-core/types/validate/validate.js').FeedbackMessageData} FeedbackMessageData
+ * @typedef {import('@lion/ui/localize.js').LocalizeManager} LocalizeManager
+ */
+
+let loaded = false;
+
+/**
+ * @param {{localize: LocalizeManager}} opts allow multiple lion/extension lib versions to provide their deduped instance of LocalizeManager
+ * @returns
+ */
+export function loadDefaultFeedbackMessagesNoSideEffects({ localize }) {
+  if (loaded === true) {
+    return;
+  }
+
+  const forMessagesToBeReady = () =>
+    localize.loadNamespace(
+      {
+        'lion-validate': /** @param {string} locale */ locale => {
+          switch (locale) {
+            case 'bg-BG':
+              return import('@lion/ui/validate-messages-translations/bg-BG.js');
+            case 'bg':
+              return import('@lion/ui/validate-messages-translations/bg.js');
+            case 'cs-CZ':
+              return import('@lion/ui/validate-messages-translations/cs-CZ.js');
+            case 'cs':
+              return import('@lion/ui/validate-messages-translations/cs.js');
+            case 'de-DE':
+              return import('@lion/ui/validate-messages-translations/de-DE.js');
+            case 'de':
+              return import('@lion/ui/validate-messages-translations/de.js');
+            case 'en-AU':
+              return import('@lion/ui/validate-messages-translations/en-AU.js');
+            case 'en-GB':
+              return import('@lion/ui/validate-messages-translations/en-GB.js');
+            case 'en-US':
+              return import('@lion/ui/validate-messages-translations/en-US.js');
+            case 'en-PH':
+              return import('@lion/ui/validate-messages-translations/en-PH.js');
+            case 'en':
+              return import('@lion/ui/validate-messages-translations/en.js');
+            case 'es-ES':
+              return import('@lion/ui/validate-messages-translations/es-ES.js');
+            case 'es':
+              return import('@lion/ui/validate-messages-translations/es.js');
+            case 'fr-FR':
+              return import('@lion/ui/validate-messages-translations/fr-FR.js');
+            case 'fr-BE':
+              return import('@lion/ui/validate-messages-translations/fr-BE.js');
+            case 'fr':
+              return import('@lion/ui/validate-messages-translations/fr.js');
+            case 'hu-HU':
+              return import('@lion/ui/validate-messages-translations/hu-HU.js');
+            case 'hu':
+              return import('@lion/ui/validate-messages-translations/hu.js');
+            case 'it-IT':
+              return import('@lion/ui/validate-messages-translations/it-IT.js');
+            case 'it':
+              return import('@lion/ui/validate-messages-translations/it.js');
+            case 'nl-BE':
+              return import('@lion/ui/validate-messages-translations/nl-BE.js');
+            case 'nl-NL':
+              return import('@lion/ui/validate-messages-translations/nl-NL.js');
+            case 'nl':
+              return import('@lion/ui/validate-messages-translations/nl.js');
+            case 'pl-PL':
+              return import('@lion/ui/validate-messages-translations/pl-PL.js');
+            case 'pl':
+              return import('@lion/ui/validate-messages-translations/pl.js');
+            case 'ro-RO':
+              return import('@lion/ui/validate-messages-translations/ro-RO.js');
+            case 'ro':
+              return import('@lion/ui/validate-messages-translations/ro.js');
+            case 'ru-RU':
+              return import('@lion/ui/validate-messages-translations/ru-RU.js');
+            case 'ru':
+              return import('@lion/ui/validate-messages-translations/ru.js');
+            case 'sk-SK':
+              return import('@lion/ui/validate-messages-translations/sk-SK.js');
+            case 'sk':
+              return import('@lion/ui/validate-messages-translations/sk.js');
+            case 'uk-UA':
+              return import('@lion/ui/validate-messages-translations/uk-UA.js');
+            case 'uk':
+              return import('@lion/ui/validate-messages-translations/uk.js');
+            case 'zh-CN':
+            case 'zh':
+              return import('@lion/ui/validate-messages-translations/zh.js');
+            default:
+              return import('@lion/ui/validate-messages-translations/en.js');
+          }
+        },
+      },
+      { locale: localize.locale },
+    );
+
+  /**
+   * @param {FeedbackMessageData} data
+   * @returns {Promise<string|Element>}
+   */
+  const getLocalizedMessage = async data => {
+    await forMessagesToBeReady();
+    if (data) {
+      return localize.msg(`lion-validate:${data.type}.${data.name}`, data);
+    }
+    return '';
+  };
+
+  /** @param {FeedbackMessageData} data */
+  Required.getMessage = async data => getLocalizedMessage(data);
+  /** @param {FeedbackMessageData} data */
+  EqualsLength.getMessage = async data => getLocalizedMessage(data);
+  /** @param {FeedbackMessageData} data */
+  MinLength.getMessage = async data => getLocalizedMessage(data);
+  /** @param {FeedbackMessageData} data */
+  MaxLength.getMessage = async data => getLocalizedMessage(data);
+  /** @param {FeedbackMessageData} data */
+  MinMaxLength.getMessage = async data => getLocalizedMessage(data);
+  /** @param {FeedbackMessageData} data */
+  Pattern.getMessage = async data => getLocalizedMessage(data);
+  /** @param {FeedbackMessageData} data */
+  IsEmail.getMessage = async data => getLocalizedMessage(data);
+  /** @param {FeedbackMessageData} data */
+  IsNumber.getMessage = async data => getLocalizedMessage(data);
+  /** @param {FeedbackMessageData} data */
+  MinNumber.getMessage = async data => getLocalizedMessage(data);
+  /** @param {FeedbackMessageData} data */
+  MaxNumber.getMessage = async data => getLocalizedMessage(data);
+  /** @param {FeedbackMessageData} data */
+  MinMaxNumber.getMessage = async data => getLocalizedMessage(data);
+  /** @param {FeedbackMessageData} data */
+  IsDate.getMessage = async data => getLocalizedMessage(data);
+  /** @param {FeedbackMessageData} data */
+  MinDate.getMessage = async data => getLocalizedMessage(data);
+  /** @param {FeedbackMessageData} data */
+  MaxDate.getMessage = async data => getLocalizedMessage(data);
+  /** @param {FeedbackMessageData} data */
+  MinMaxDate.getMessage = async data => getLocalizedMessage(data);
+  /** @param {FeedbackMessageData} data */
+  IsDateDisabled.getMessage = async data => getLocalizedMessage(data);
+
+  DefaultSuccess.getMessage = async data => {
+    await forMessagesToBeReady();
+    const randomKeys = localize.msg('lion-validate:success.RandomOk').split(',');
+    const key = randomKeys[Math.floor(Math.random() * randomKeys.length)].trim();
+    return localize.msg(`lion-validate:${key}`, data);
+  };
+
+  /** @param {FeedbackMessageData} data */
+  // @ts-ignore
+  PhoneNumber.getMessage = async data => {
+    await forMessagesToBeReady();
+    const { type, outcome } = data;
+    if (outcome === 'too-long') {
+      // TODO: get max-length of country and use MaxLength validator
+      return localize.msg(`lion-validate:${type}.Pattern`, data);
+    }
+    if (outcome === 'too-short') {
+      // TODO: get min-length of country and use MinLength validator
+      return localize.msg(`lion-validate:${type}.Pattern`, data);
+    }
+    // TODO: add a more specific message here
+    if (outcome === 'invalid-country-code') {
+      return localize.msg(`lion-validate:${type}.Pattern`, data);
+    }
+    return localize.msg(`lion-validate:${type}.Pattern`, data);
+  };
+
+  loaded = true;
+}
diff --git a/packages/ui/components/validate-messages/test/loadDefaultFeedbackMessages.test.js b/packages/ui/components/validate-messages/test/loadDefaultFeedbackMessages.test.js
index e55d76940..f0bf1c9ab 100644
--- a/packages/ui/components/validate-messages/test/loadDefaultFeedbackMessages.test.js
+++ b/packages/ui/components/validate-messages/test/loadDefaultFeedbackMessages.test.js
@@ -1,6 +1,5 @@
 /* eslint-disable no-unused-vars, no-param-reassign */
 import { expect } from '@open-wc/testing';
-import { localize } from '@lion/ui/localize.js';
 import { Required } from '@lion/ui/form-core.js';
 import { loadDefaultFeedbackMessages } from '@lion/ui/validate-messages.js';
 
@@ -20,7 +19,7 @@ function getProtectedMembers(validatorEl) {
 }
 
 describe('loadDefaultFeedbackMessages', () => {
-  it('will set default feedback message for Required', async () => {
+  it('will work without providing a LocalizeManager instance', async () => {
     const el = new Required();
     const { getMessage } = getProtectedMembers(el);
     expect(await getMessage()).to.equals(
@@ -30,20 +29,4 @@ describe('loadDefaultFeedbackMessages', () => {
     loadDefaultFeedbackMessages();
     expect(await getMessage({ fieldName: 'password' })).to.equal('Please enter a(n) password.');
   });
-
-  it('will await loading of translations when switching locale', async () => {
-    const el = new Required();
-    const { getMessage } = getProtectedMembers(el);
-    loadDefaultFeedbackMessages();
-    expect(await getMessage({ fieldName: 'password' })).to.equal('Please enter a(n) password.');
-    expect(await getMessage({ fieldName: 'user name' })).to.equal('Please enter a(n) user name.');
-
-    localize.locale = 'de-DE';
-    expect(await getMessage({ fieldName: 'Password' })).to.equal(
-      'Password muss ausgefüllt werden.',
-    );
-    expect(await getMessage({ fieldName: 'Benutzername' })).to.equal(
-      'Benutzername muss ausgefüllt werden.',
-    );
-  });
 });
diff --git a/packages/ui/components/validate-messages/test/loadDefaultFeedbackMessagesNoSideEffects.js b/packages/ui/components/validate-messages/test/loadDefaultFeedbackMessagesNoSideEffects.js
new file mode 100644
index 000000000..19d97755c
--- /dev/null
+++ b/packages/ui/components/validate-messages/test/loadDefaultFeedbackMessagesNoSideEffects.js
@@ -0,0 +1,49 @@
+/* eslint-disable no-unused-vars, no-param-reassign */
+import { expect } from '@open-wc/testing';
+import { localize } from '@lion/ui/localize.js';
+import { Required } from '@lion/ui/form-core.js';
+import { loadDefaultFeedbackMessagesNoSideEffects } from '@lion/ui/validate-messages-no-side-effects.js';
+
+/**
+ * @typedef {import('../../form-core/src/validate/Validator.js').Validator} Validator
+ */
+
+/**
+ * @param {Validator} validatorEl
+ */
+function getProtectedMembers(validatorEl) {
+  // @ts-ignore protected members allowed in test
+  return {
+    // @ts-ignore
+    getMessage: (...args) => validatorEl._getMessage(...args),
+  };
+}
+
+describe('loadDefaultFeedbackMessagesNoSideEffects', () => {
+  it('will set default feedback message for Required', async () => {
+    const el = new Required();
+    const { getMessage } = getProtectedMembers(el);
+    expect(await getMessage()).to.equals(
+      'Please configure an error message for "Required" by overriding "static async getMessage()"',
+    );
+
+    loadDefaultFeedbackMessagesNoSideEffects({ localize });
+    expect(await getMessage({ fieldName: 'password' })).to.equal('Please enter a(n) password.');
+  });
+
+  it('will await loading of translations when switching locale', async () => {
+    const el = new Required();
+    const { getMessage } = getProtectedMembers(el);
+    loadDefaultFeedbackMessagesNoSideEffects({ localize });
+    expect(await getMessage({ fieldName: 'password' })).to.equal('Please enter a(n) password.');
+    expect(await getMessage({ fieldName: 'user name' })).to.equal('Please enter a(n) user name.');
+
+    localize.locale = 'de-DE';
+    expect(await getMessage({ fieldName: 'Password' })).to.equal(
+      'Password muss ausgefüllt werden.',
+    );
+    expect(await getMessage({ fieldName: 'Benutzername' })).to.equal(
+      'Benutzername muss ausgefüllt werden.',
+    );
+  });
+});
diff --git a/packages/ui/exports/validate-messages-no-side-effects.js b/packages/ui/exports/validate-messages-no-side-effects.js
new file mode 100644
index 000000000..447b4986e
--- /dev/null
+++ b/packages/ui/exports/validate-messages-no-side-effects.js
@@ -0,0 +1 @@
+export { loadDefaultFeedbackMessagesNoSideEffects } from '../components/validate-messages/src/loadDefaultFeedbackMessagesNoSideEffects.js';