diff --git a/docs/METHODS_RPC.md b/docs/METHODS_RPC.md
index 62dac0aaa5..134f46e882 100644
--- a/docs/METHODS_RPC.md
+++ b/docs/METHODS_RPC.md
@@ -40,7 +40,7 @@ _Retrieval of chain data_
 - **summary**: Get the block hash for a specific block
 
 ▸ **getFinalizedHead**(): `Hash`
-- **summary**: Get hash of the last finalised block in the canon chain
+- **summary**: Get hash of the last finalized block in the canon chain
 
 ▸ **getHeader**(hash?: `Hash`): `Header`
 - **summary**: Retrieves the header for a specific block
diff --git a/packages/api-derive/src/chain/bestNumberFinalized.ts b/packages/api-derive/src/chain/bestNumberFinalized.ts
index bb0e889392..8a931b9b76 100644
--- a/packages/api-derive/src/chain/bestNumberFinalized.ts
+++ b/packages/api-derive/src/chain/bestNumberFinalized.ts
@@ -10,13 +10,13 @@ import { BlockNumber, Header } from '@polkadot/types';
 import { drr } from '../util/drr';
 
 /**
- * @description Get the latest finalised block number.
+ * @description Get the latest finalized block number.
  * example
  * <BR>
  *
  * ```javascript
  * api.derive.chain.bestNumberFinalized((blockNumber) => {
- *   console.log(`the current finalised block is #${blockNumber}`);
+ *   console.log(`the current finalized block is #${blockNumber}`);
  * });
  * ```
  */
diff --git a/packages/api-derive/src/chain/bestNumberLag.ts b/packages/api-derive/src/chain/bestNumberLag.ts
index 3bb17ad5d9..ab1731d63f 100644
--- a/packages/api-derive/src/chain/bestNumberLag.ts
+++ b/packages/api-derive/src/chain/bestNumberLag.ts
@@ -12,13 +12,13 @@ import { bestNumber } from './bestNumber';
 import { bestNumberFinalized } from './bestNumberFinalized';
 
 /**
- * @description Calculates the lag between finalised head and best head
+ * @description Calculates the lag between finalized head and best head
  * @example
  * <BR>
  *
  * ```javascript
  * api.derive.chain.bestNumberLag((lag) => {
- *   console.log(`finalised is ${lag} blocks behind head`);
+ *   console.log(`finalized is ${lag} blocks behind head`);
  * });
  * ```
  */
diff --git a/packages/api/test/e2e/promise-alex.spec.js b/packages/api/test/e2e/promise-alex.spec.js
index 1a67f96a42..4c7faf89ff 100644
--- a/packages/api/test/e2e/promise-alex.spec.js
+++ b/packages/api/test/e2e/promise-alex.spec.js
@@ -5,6 +5,8 @@
 import Api from '../../src/promise';
 import WsProvider from '../../../rpc-provider/src/ws';
 
+import { Hash, Header } from '@polkadot/types';
+
 describe.skip('alex queries', () => {
   let api;
 
@@ -65,6 +67,20 @@ describe.skip('alex queries', () => {
         // done();
       });
     });
+
+    it('Gets the hash of the last finalized header', async (done) => {
+      api.rpc.chain.getFinalizedHead((head) => {
+        expect(head instanceof Hash).toBe(true);
+        done();
+      });
+    });
+
+    it('Subscribes to the best finalized header on ALEX', async (done) => {
+      api.rpc.chain.subscribeFinalizedHeads((heads) => {
+        expect(heads instanceof Header).toBe(true);
+        done();
+      });
+    });
   });
 
   describe.skip('Local archive queries (for debug)', () => {
diff --git a/packages/rpc-provider/src/ws/Provider.ts b/packages/rpc-provider/src/ws/Provider.ts
index d4e973c219..ab161dbef9 100644
--- a/packages/rpc-provider/src/ws/Provider.ts
+++ b/packages/rpc-provider/src/ws/Provider.ts
@@ -36,7 +36,9 @@ interface WSProviderInterface extends ProviderInterface {
 }
 
 const ALIASSES: { [index: string]: string } = {
-  'chain_finalisedHead': 'chain_finalizedHead'
+  'chain_finalisedHead': 'chain_finalizedHead',
+  'chain_subscribeFinalisedHeads': 'chain_subscribeFinalizedHeads',
+  'chain_unsubscribeFinalisedHeads': 'chain_unsubscribeFinalizedHeads'
 };
 
 const l = logger('api-ws');
diff --git a/packages/type-jsonrpc/src/chain.ts b/packages/type-jsonrpc/src/chain.ts
index ef7570f926..75b817936e 100644
--- a/packages/type-jsonrpc/src/chain.ts
+++ b/packages/type-jsonrpc/src/chain.ts
@@ -34,7 +34,7 @@ const getBlockHash: RpcMethodOpt = {
 };
 
 const getFinalizedHead: RpcMethodOpt = {
-  description: 'Get hash of the last finalised block in the canon chain',
+  description: 'Get hash of the last finalized block in the canon chain',
   params: [],
   type: 'Hash'
 };
@@ -63,9 +63,8 @@ const subscribeFinalizedHeads: RpcMethodOpt = {
   params: [],
   pubsub: [
     'finalizedHead',
-    // TODO US spelling
-    'subscribeFinalisedHeads',
-    'unsubscribeFinalisedHeads'
+    'subscribeFinalizedHeads',
+    'unsubscribeFinalizedHeads'
   ],
   type: 'Header'
 };
@@ -95,11 +94,11 @@ export default {
     getBlock: createMethod(section, 'getBlock', getBlock),
     getBlockHash: createMethod(section, 'getBlockHash', getBlockHash),
     // TODO US spelling
-    getFinalizedHead: createMethod(section, 'getFinalisedHead', getFinalizedHead),
+    getFinalizedHead: createMethod(section, 'getFinalizedHead', getFinalizedHead),
     getHeader: createMethod(section, 'getHeader', getHeader),
     getRuntimeVersion: createMethod(section, 'getRuntimeVersion', getRuntimeVersion),
     // TODO US spelling
-    subscribeFinalizedHeads: createMethod(section, 'subscribeFinalisedHeads', subscribeFinalizedHeads),
+    subscribeFinalizedHeads: createMethod(section, 'subscribeFinalizedHeads', subscribeFinalizedHeads),
     subscribeRuntimeVersion: createMethod(section, 'subscribeRuntimeVersion', subscribeRuntimeVersion),
     subscribeNewHead: createMethod(section, 'subscribeNewHead', subscribeNewHead)
   }