diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index d2f74fe..a5fa0b8 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -14,6 +14,18 @@ permissions:
   contents: read
 
 jobs:
+  typos:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+
+      - name: Setup Nix
+        uses: ./.github/actions/setup-nix
+
+      - name: Run Typo Check
+        run: nix develop --command just typos
+
   ci:
     runs-on: ubuntu-latest
     strategy:
diff --git a/README.md b/README.md
index a822426..e4af614 100644
--- a/README.md
+++ b/README.md
@@ -73,7 +73,7 @@ uv add 'stackone-ai[mcp,examples]'
 ```python
 from stackone_ai import StackOneToolSet
 
-# Initialise with API key
+# Initialize with API key
 toolset = StackOneToolSet()  # Uses STACKONE_API_KEY env var
 # Or explicitly: toolset = StackOneToolSet(api_key="your-api-key")
 
@@ -133,11 +133,11 @@ tools = toolset.fetch_tools(providers=["hibob"])
 
 ## Implicit Feedback (Beta)
 
-The Python SDK can emit implicit behavioural feedback to LangSmith so you can triage low-quality tool results without manually tagging runs.
+The Python SDK can emit implicit behavioral feedback to LangSmith so you can triage low-quality tool results without manually tagging runs.
 
 ### Automatic configuration
 
-Set `LANGSMITH_API_KEY` in your environment and the SDK will initialise the implicit feedback manager on first tool execution. You can optionally fine-tune behaviour with:
+Set `LANGSMITH_API_KEY` in your environment and the SDK will initialize the implicit feedback manager on first tool execution. You can optionally fine-tune behavior with:
 
 - `STACKONE_IMPLICIT_FEEDBACK_ENABLED` (`true`/`false`, defaults to `true` when an API key is present)
 - `STACKONE_IMPLICIT_FEEDBACK_PROJECT` to pin a LangSmith project name
@@ -187,7 +187,7 @@ StackOne tools work seamlessly with LangChain, enabling powerful AI agent workfl
 from langchain_openai import ChatOpenAI
 from stackone_ai import StackOneToolSet
 
-# Initialise StackOne tools
+# Initialize StackOne tools
 toolset = StackOneToolSet()
 tools = toolset.fetch_tools(actions=["hris_*"], account_ids=["your-account-id"])
 
@@ -282,7 +282,7 @@ langchain_tools = tools.to_langchain()
 # Create CrewAI agent with StackOne tools
 agent = Agent(
     role="HR Manager",
-    goal="Analyse employee data and generate insights",
+    goal="Analyze employee data and generate insights",
     backstory="Expert in HR analytics and employee management",
     tools=langchain_tools,
     llm="gpt-4o-mini"
diff --git a/flake.nix b/flake.nix
index 7f50eb8..b9e3670 100644
--- a/flake.nix
+++ b/flake.nix
@@ -54,6 +54,7 @@
                   "CHANGELOG.md"
                 ];
               };
+              typos.enable = true;
             };
           };
 
@@ -81,6 +82,8 @@
               uv
               just
               nixfmt-rfc-style
+              typos
+              typos-lsp
             ];
 
             shellHook = ''
diff --git a/justfile b/justfile
index 1a9d7e7..7021bda 100644
--- a/justfile
+++ b/justfile
@@ -26,6 +26,14 @@ test-examples:
 mypy:
 	uv run mypy stackone_ai
 
+# Run typos spell checker
+typos:
+	typos --config typos.toml .
+
+# Fix typos
+typos-fix:
+	typos --config typos.toml --write-changes .
+
 # Update version in __init__.py
 update-version:
 	uv run scripts/update_version.py
diff --git a/stackone_ai/constants.py b/stackone_ai/constants.py
index 2673762..a33428d 100644
--- a/stackone_ai/constants.py
+++ b/stackone_ai/constants.py
@@ -1,5 +1,5 @@
 # Hybrid search default weight for BM25 vs TF-IDF
 # alpha=0.2 means: 20% BM25 + 80% TF-IDF
-# This value was optimised through validation testing and provides
+# This value was optimized through validation testing and provides
 # 10.8% improvement in tool discovery accuracy
 DEFAULT_HYBRID_ALPHA: float = 0.2
diff --git a/typos.toml b/typos.toml
new file mode 100644
index 0000000..56ddf65
--- /dev/null
+++ b/typos.toml
@@ -0,0 +1,15 @@
+[default]
+locale = 'en-us'
+extend-ignore-re = [
+  "(?s)(#|//)\\s*spellchecker:off.*?\\n\\s*(#|//)\\s*spellchecker:on",
+  "(?s)<!--\\s*spellchecker:off.*?\\n\\s*spellchecker:on\\s*-->",
+  "(?Rm)^.*#\\s*spellchecker:disable-line$",
+  "(?m)^.*<!--\\s*spellchecker:disable-line\\s*-->\\n.*$"
+]
+
+[files]
+extend-exclude = [
+  ".venv",
+  "uv.lock",
+  "CHANGELOG.md",
+]