diff --git a/src/build/app/mod.rs b/src/build/app/mod.rs
index f38e4820408..d1e8cb7bcc8 100644
--- a/src/build/app/mod.rs
+++ b/src/build/app/mod.rs
@@ -821,7 +821,7 @@ impl<'help> App<'help> {
     ///            Does awesome things\n\
     ///            (C) me@mail.com\n\n\
     ///
-    ///            USAGE: myapp <opts> <comamnd>\n\n\
+    ///            USAGE: myapp <opts> <command>\n\n\
     ///
     ///            Options:\n\
     ///            -h, --help       Display this message\n\
@@ -829,7 +829,7 @@ impl<'help> App<'help> {
     ///            -s <stuff>       Do something with stuff\n\
     ///            -v               Be verbose\n\n\
     ///
-    ///            Commmands:\n\
+    ///            Commands:\n\
     ///            help             Print this message\n\
     ///            work             Do some work")
     /// # ;
@@ -2490,7 +2490,7 @@ impl<'help> App<'help> {
 
                 // Remove generated help and version args in the subcommand
                 //
-                // Don't remove if those args are futher mutated
+                // Don't remove if those args are further mutated
                 if is_generated {
                     let generated_pos = sc
                         .args
@@ -2743,7 +2743,7 @@ impl<'help> App<'help> {
                     // Print val_name for positional arguments. e.g. <file_name>
                     x.name_no_brackets().to_string()
                 } else {
-                    // Print useage string for flags arguments, e.g. <--help>
+                    // Print usage string for flags arguments, e.g. <--help>
                     x.to_string()
                 }
             })
diff --git a/src/build/arg/mod.rs b/src/build/arg/mod.rs
index 813b097b240..eff596daa74 100644
--- a/src/build/arg/mod.rs
+++ b/src/build/arg/mod.rs
@@ -4367,7 +4367,7 @@ impl<'help> Arg<'help> {
     /// assert_eq!(files, ["file1", "file2", "file3"]);
     /// ```
     ///
-    /// Although `MultipleVlaues` has been specified, we cannot use the argument more than once.
+    /// Although `MultipleValues` has been specified, we cannot use the argument more than once.
     ///
     /// ```rust
     /// # use clap::{App, Arg, ErrorKind, ArgSettings};
@@ -5120,7 +5120,7 @@ where
             }
         }
     } else if let Some(num_vals) = arg.num_vals {
-        // If number_of_values is sepcified, display the value multiple times.
+        // If number_of_values is specified, display the value multiple times.
         let arg_name = format!("<{}>", arg.name);
         let mut it = iter::repeat(&arg_name).take(num_vals).peekable();
         while let Some(arg_name) = it.next() {
diff --git a/src/build/arg/possible_value.rs b/src/build/arg/possible_value.rs
index 34420e0c7bf..33aba43c381 100644
--- a/src/build/arg/possible_value.rs
+++ b/src/build/arg/possible_value.rs
@@ -107,7 +107,7 @@ impl<'help> PossibleValue<'help> {
 
 impl<'help> PossibleValue<'help> {
     /// Creates a new instance of [`PossibleValue`] using a string name. The name will be used to
-    /// decide wether this value was provided by the user to an argument.
+    /// decide whether this value was provided by the user to an argument.
     ///
     /// **NOTE:** In case it is not [hidden] it will also be shown in help messages for arguments
     /// that use it as a [possible value] and have not hidden them through [`Arg::hide_possible_values(true)`].
diff --git a/src/output/help.rs b/src/output/help.rs
index 3850d5d9ccc..6c7423935e2 100644
--- a/src/output/help.rs
+++ b/src/output/help.rs
@@ -1039,7 +1039,7 @@ mod test {
 
     #[test]
     fn display_width_handles_non_ascii() {
-        // Popular Danish tounge-twister, the name of a fruit dessert.
+        // Popular Danish tongue-twister, the name of a fruit dessert.
         let text = "rødgrød med fløde";
         assert_eq!(display_width(text), 17);
         // Note that the string width is smaller than the string
diff --git a/typos.toml b/typos.toml
new file mode 100644
index 00000000000..8ccd969f308
--- /dev/null
+++ b/typos.toml
@@ -0,0 +1,8 @@
+files.extend-exclude = [
+  "CHANGELOG.md",
+  "tests",
+]
+[default.extend-words]
+# Acronyms
+als = "als"
+lits = "lits"