diff --git a/web/cashtab/src/hooks/useWallet.js b/web/cashtab/src/hooks/useWallet.js
--- a/web/cashtab/src/hooks/useWallet.js
+++ b/web/cashtab/src/hooks/useWallet.js
@@ -19,6 +19,7 @@
     isValidCashtabCache,
     isValidContactList,
     parseInvalidSettingsForMigration,
+    validateMnemonicWordList,
 } from 'utils/validation';
 import localforage from 'localforage';
 import { currency } from 'components/Common/Ticker';
@@ -906,6 +907,16 @@
 
         try {
             mnemonicTestOutput = BCH.Mnemonic.validate(mnemonic, wordlist);
+            const localMnemonicTestOutput = validateMnemonicWordList(
+                mnemonic,
+                wordlist,
+            );
+
+            if (mnemonicTestOutput === localMnemonicTestOutput) {
+                console.log(
+                    'mnemonicTestOutput matches localMnemonicTestOutput',
+                );
+            }
 
             if (mnemonicTestOutput === 'Valid mnemonic') {
                 return true;
diff --git a/web/cashtab/src/utils/__tests__/validation.test.js b/web/cashtab/src/utils/__tests__/validation.test.js
--- a/web/cashtab/src/utils/__tests__/validation.test.js
+++ b/web/cashtab/src/utils/__tests__/validation.test.js
@@ -21,6 +21,7 @@
     isValidContactList,
     parseInvalidSettingsForMigration,
     isValidCashtabCache,
+    validateMnemonicWordList,
 } from '../validation';
 import { currency } from 'components/Common/Ticker.js';
 import { fromSatoshisToXec } from 'utils/cashMethods';
@@ -48,8 +49,28 @@
     cashtabCacheWithTokenNameNotString,
     cashtabCacheWithMissingTokenName,
 } from 'utils/__mocks__/mockCashtabCache';
+import * as bip39 from 'bip39';
 
 describe('Validation utils', () => {
+    it(`validateMnemonicWordList() returns a success message for a valid mnemonic`, () => {
+        const validMnemonic =
+            'labor tail bulb distance estate collect lecture into smile differ yard legal';
+        expect(
+            validateMnemonicWordList(validMnemonic, bip39.wordlists.english),
+        ).toBe('Valid mnemonic');
+    });
+    it(`validateMnemonicWordList() returns an error message for an invalid mnemonic`, () => {
+        const validMnemonic =
+            'labor tail bulb not valid collect lecture into smile differ yard legal';
+        expect(
+            validateMnemonicWordList(validMnemonic, bip39.wordlists.english),
+        ).toBe('Invalid mnemonic');
+    });
+    it(`validateMnemonicWordList() returns an error message for an empty mnemonic`, () => {
+        expect(validateMnemonicWordList('', bip39.wordlists.english)).toBe(
+            'Invalid mnemonic',
+        );
+    });
     it(`Returns 'false' if ${currency.ticker} send amount is a valid send amount`, () => {
         expect(shouldRejectAmountInput('10', currency.ticker, 20.0, 300)).toBe(
             false,
diff --git a/web/cashtab/src/utils/validation.js b/web/cashtab/src/utils/validation.js
--- a/web/cashtab/src/utils/validation.js
+++ b/web/cashtab/src/utils/validation.js
@@ -2,6 +2,21 @@
 import { currency } from 'components/Common/Ticker.js';
 import { fromSatoshisToXec } from 'utils/cashMethods';
 import cashaddr from 'ecashaddrjs';
+import * as bip39 from 'bip39';
+
+// reference: https://github.com/Permissionless-Software-Foundation/bch-js/blob/62e56c832b35731880fe448269818b853c76dd80/src/mnemonic.js#L160-L180
+export const validateMnemonicWordList = (mnemonic, wordlist) => {
+    // Preprocess the words
+    const words = mnemonic.split(' ');
+    // Detect blank phrase
+    if (words.length === 0) return 'Blank mnemonic';
+
+    // Check the words are valid
+    const isValid = bip39.validateMnemonic(mnemonic, wordlist);
+    if (!isValid) return 'Invalid mnemonic';
+
+    return 'Valid mnemonic';
+};
 
 // Validate cash amount
 export const shouldRejectAmountInput = (