diff --git a/.github/config-schema.json b/.github/config-schema.json
index cf03dce7..67988de3 100644
--- a/.github/config-schema.json
+++ b/.github/config-schema.json
@@ -475,7 +475,7 @@
     },
     "fennel": {
       "default": {
-        "detect_extentions": [
+        "detect_extensions": [
           "fnl"
         ],
         "detect_files": [],
@@ -2955,7 +2955,7 @@
           "default": true,
           "type": "boolean"
         },
-        "detect_extentions": {
+        "detect_extensions": {
           "default": [
             "fnl"
           ],
diff --git a/.github/workflows/spell-check.yml b/.github/workflows/spell-check.yml
new file mode 100644
index 00000000..b1838748
--- /dev/null
+++ b/.github/workflows/spell-check.yml
@@ -0,0 +1,10 @@
+name: Spell Check
+on: [pull_request]
+
+jobs:
+  typos:
+    name: Spell Check with Typos
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: crate-ci/typos@v1.13.18
diff --git a/Cargo.toml b/Cargo.toml
index a4b85bcc..271c2714 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -34,7 +34,7 @@ battery = ["starship-battery"]
 config-schema = ["schemars"]
 notify = ["notify-rust"]
 
-# Enables most of the `max-performace` features of the `gix` module for better performance.
+# Enables most of the `max-performance` features of the `gix` module for better performance.
 # This can be more difficult to build in some conditions and requires cmake.
 gix-max-perf = ["gix-features/zlib-ng", "gix/fast-sha1"]
 # Slower than `git-repository-max-perf`, but better than the default.
@@ -53,7 +53,7 @@ gix = { version = "0.42.0", default-features = false, features = ["max-performan
 gix-features = { version = "0.28.1", optional = true }
 indexmap = { version = "1.9.2", features = ["serde"] }
 log = { version = "0.4.17", features = ["std"] }
-# nofity-rust is optional (on by default) because the crate doesn't currently build for darwin with nix
+# notify-rust is optional (on by default) because the crate doesn't currently build for darwin with nix
 # see: https://github.com/NixOS/nixpkgs/issues/160876
 notify-rust = { version = "4.8.0", optional = true }
 nu-ansi-term = "0.47.0"
diff --git a/install/macos_packages/readme.md b/install/macos_packages/readme.md
index 07cfac33..5b7aafdd 100644
--- a/install/macos_packages/readme.md
+++ b/install/macos_packages/readme.md
@@ -204,7 +204,7 @@ there are two .plist files that can be used to specify the architecture required
 
 ## Signing the Distribution package
 
-This is also fairly simple, and analagous to signing the binary.
+This is also fairly simple, and analogous to signing the binary.
 
 ```
 productsign --timestamp --sign "<Key ID>" <input.pkg> <output.pkg>
@@ -212,7 +212,7 @@ productsign --timestamp --sign "<Key ID>" <input.pkg> <output.pkg>
 
 ## Notarizing the Distribution Package
 
-Also analagous to notarizing the binary. We run
+Also analogous to notarizing the binary. We run
 
 ```
 xcrun notarytool submit <package.pkg> --keychain-profile "AC_PASSWORD" --wait
diff --git a/install/windows/main.wxs b/install/windows/main.wxs
index 41c2280b..d07e31ed 100644
--- a/install/windows/main.wxs
+++ b/install/windows/main.wxs
@@ -138,7 +138,7 @@
 
                 1. Comment out or remove the two `Publish` tags that follow the
                    `WixVariable` tag.
-                2. Uncomment the `<WixVariable Id='WixUILicenseRtf' Value='Path\to\Eula.rft'>` tag futher down
+                2. Uncomment the `<WixVariable Id='WixUILicenseRtf' Value='Path\to\Eula.rft'>` tag further down
                 3. Replace the `Value` attribute of the `WixVariable` tag with
                    the path to a RTF file that will be used as the EULA and
                    displayed in the license agreement dialog.
@@ -158,7 +158,7 @@
 
 
     <!--
-          Uncomment the next `WixVaraible` tag to customize the installer's
+          Uncomment the next `WixVariable` tag to customize the installer's
           Graphical User Interface (GUI) and add a custom banner image across
           the top of each screen. See the WiX Toolset documentation for details
           about customization.
@@ -180,4 +180,4 @@
 
   </Product>
 
-</Wix>
\ No newline at end of file
+</Wix>
diff --git a/src/configs/fennel.rs b/src/configs/fennel.rs
index e0564c9e..a9900275 100644
--- a/src/configs/fennel.rs
+++ b/src/configs/fennel.rs
@@ -13,7 +13,8 @@ pub struct FennelConfig<'a> {
     pub symbol: &'a str,
     pub style: &'a str,
     pub disabled: bool,
-    pub detect_extentions: Vec<&'a str>,
+    #[serde(alias = "detect_extentions")] // TODO: remove it after breaking change releases
+    pub detect_extensions: Vec<&'a str>,
     pub detect_files: Vec<&'a str>,
     pub detect_folders: Vec<&'a str>,
 }
@@ -26,7 +27,7 @@ impl<'a> Default for FennelConfig<'a> {
             symbol: "🧅 ",
             style: "bold green",
             disabled: true,
-            detect_extentions: vec!["fnl"],
+            detect_extensions: vec!["fnl"],
             detect_files: vec![],
             detect_folders: vec![],
         }
diff --git a/src/configure.rs b/src/configure.rs
index ce7e55b2..a77c8334 100644
--- a/src/configure.rs
+++ b/src/configure.rs
@@ -378,7 +378,7 @@ mod tests {
     }
 
     #[test]
-    fn no_panic_when_editor_unparseable() {
+    fn no_panic_when_editor_unparsable() {
         let outcome = edit_configuration(Some("\"vim"));
         assert!(outcome.is_err());
     }
diff --git a/src/modules/env_var.rs b/src/modules/env_var.rs
index 2d994f62..8e7358e2 100644
--- a/src/modules/env_var.rs
+++ b/src/modules/env_var.rs
@@ -70,7 +70,7 @@ pub fn module<'a>(name: Option<&str>, context: &'a Context) -> Option<Module<'a>
 }
 
 /// Filter `config` to only includes non-table values
-/// This filters the top-level table to only include its specific configuation
+/// This filters the top-level table to only include its specific configuration
 fn filter_config(config: &toml::Value) -> Option<toml::Value> {
     let o = config
         .as_table()
diff --git a/src/modules/fennel.rs b/src/modules/fennel.rs
index 4b8a2fc9..82b1c7bf 100644
--- a/src/modules/fennel.rs
+++ b/src/modules/fennel.rs
@@ -11,7 +11,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
     let is_fnl_project = context
         .try_begin_scan()?
         .set_files(&config.detect_files)
-        .set_extensions(&config.detect_extentions)
+        .set_extensions(&config.detect_extensions)
         .set_folders(&config.detect_folders)
         .is_match();
 
diff --git a/src/modules/nix_shell.rs b/src/modules/nix_shell.rs
index 7913b95b..d8666ee8 100644
--- a/src/modules/nix_shell.rs
+++ b/src/modules/nix_shell.rs
@@ -29,7 +29,7 @@ impl NixShellType {
         }
     }
 
-    // Hack to detect if we're in a `nix shell` (in constrast to a `nix-shell`).
+    // Hack to detect if we're in a `nix shell` (in contrast to a `nix-shell`).
     // A better way to do this will be enabled by https://github.com/NixOS/nix/issues/6677.
     fn in_new_nix_shell(context: &Context) -> Option<()> {
         let path = context.get_env("PATH")?;
@@ -45,7 +45,7 @@ impl NixShellType {
 /// The module will use the `$IN_NIX_SHELL` and `$name` environment variable to
 /// determine if it's inside a nix-shell and the name of it.
 ///
-/// The following options are availables:
+/// The following options are available:
 ///     - `impure_msg` (string)  // change the impure msg
 ///     - `pure_msg` (string)    // change the pure msg
 ///     - `unknown_msg` (string) // change the unknown message
diff --git a/src/modules/package.rs b/src/modules/package.rs
index dfe9f6eb..8c8480ab 100644
--- a/src/modules/package.rs
+++ b/src/modules/package.rs
@@ -238,7 +238,7 @@ fn get_cargo_version(context: &Context, config: &PackageConfig) -> Option<String
         // workspace version string (`package.version.worspace = true`)
         // need to read the Cargo.toml file from the workspace root
         let mut version = None;
-        // disover the workspace root
+        // discover the workspace root
         for path in context.current_dir.ancestors().skip(1) {
             // Assume the workspace root is the first ancestor that contains a Cargo.toml file
             if let Ok(mut file) = fs::File::open(path.join("Cargo.toml")) {
diff --git a/src/modules/rust.rs b/src/modules/rust.rs
index 5e5a9757..b266f6f0 100644
--- a/src/modules/rust.rs
+++ b/src/modules/rust.rs
@@ -93,7 +93,7 @@ impl RustToolingEnvironmentInfo {
     fn get_rustup_rustc_version(&self, context: &Context) -> &RustupRunRustcVersionOutcome {
         self.rustup_rustc_output.get_or_init(|| {
             let out = if let Some(toolchain) = self.get_env_toolchain_override(context) {
-                // First try runnig ~/.rustup/toolchains/<toolchain>/bin/rustc --version
+                // First try running ~/.rustup/toolchains/<toolchain>/bin/rustc --version
                 rustup_home()
                     .map(|rustup_folder| {
                         rustup_folder
diff --git a/src/test/mod.rs b/src/test/mod.rs
index 973e0f5e..48bb51ad 100644
--- a/src/test/mod.rs
+++ b/src/test/mod.rs
@@ -28,7 +28,7 @@ fn init_logger() {
     let nul = if cfg!(windows) { "nul" } else { "/dev/null" };
     let nul = PathBuf::from(nul);
 
-    // Maxmimum log level
+    // Maximum log level
     log::set_max_level(LevelFilter::Trace);
     logger.set_log_level(Level::Trace);
     logger.set_log_file_path(nul);
diff --git a/typos.toml b/typos.toml
new file mode 100644
index 00000000..bc511ced
--- /dev/null
+++ b/typos.toml
@@ -0,0 +1,11 @@
+# See https://github.com/crate-ci/typos/blob/master/docs/reference.md to configure typos
+[default.extend-words]
+mis = "mis"
+Nd = "Nd"
+edn = "edn"
+esy = "esy"
+numver = "numver"
+afe = "afe"
+extentions = "extentions" # TODO: should be extensions
+[files]
+extend-exclude = ["CHANGELOG.md", "docs/*"]