diff --git a/.code-spell-ignore b/.code-spell-ignore
deleted file mode 100644
index d915c21dd..000000000
--- a/.code-spell-ignore
+++ /dev/null
@@ -1,25 +0,0 @@
-aactual
-aafter
-aanother
-acount
-addrss
-afile
-aline
-alocator
-ans
-anumber
-aother
-aparent
-apending
-asender
-asent
-atleast
-ect
-intialize
-nd
-ot
-re-use
-shashes
-ue
-unknwn
-unsecure
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 96e87eb5f..2d6a35076 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -89,29 +89,6 @@ jobs:
         reporter: github-pr-review
         fail_on_error: true
 
-  spell-check:
-    runs-on: ubuntu-24.04
-    steps:
-    - name: Harden Runner
-      uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
-      with:
-        egress-policy: audit # TODO: change to 'egress-policy: block' after couple of runs
-
-    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      with:
-        submodules: true
-    - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
-      with:
-        python-version: '3.12'
-        cache: pip
-    - name: Bootstrap
-      run: |
-          python -m pip install --upgrade pip
-          pip install --force-reinstall codespell==2.2.4
-    - name: Check
-      run: |
-        script/code-spell check
-
   cmake-version:
     runs-on: ubuntu-24.04
     steps:
diff --git a/script/code-spell b/script/code-spell
deleted file mode 100755
index 5e007fcc0..000000000
--- a/script/code-spell
+++ /dev/null
@@ -1,70 +0,0 @@
-#!/bin/bash
-#
-#  Copyright (c) 2023, The OpenThread Authors.
-#  All rights reserved.
-#
-#  Redistribution and use in source and binary forms, with or without
-#  modification, are permitted provided that the following conditions are met:
-#  1. Redistributions of source code must retain the above copyright
-#     notice, this list of conditions and the following disclaimer.
-#  2. Redistributions in binary form must reproduce the above copyright
-#     notice, this list of conditions and the following disclaimer in the
-#     documentation and/or other materials provided with the distribution.
-#  3. Neither the name of the copyright holder nor the
-#     names of its contributors may be used to endorse or promote products
-#     derived from this software without specific prior written permission.
-#
-#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-#  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-#  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
-#  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-#  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-#  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-#  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-#  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-#  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-#  POSSIBILITY OF SUCH DAMAGE.
-#
-
-#
-# The script to correct or check the code spell of OpenThread.
-#
-# Correct wrong spelling:
-#     script/code-spell
-#
-# Check only:
-#
-#     script/code-spell check
-
-set -euxo pipefail
-
-OT_SPELL_CHECK_IGNORE_CONFIG_FILE='.code-spell-ignore'
-readonly OT_SPELL_CHECK_IGNORE_CONFIG_FILE
-
-OT_SPELL_CHECK_DIRS=(
-    'doc'
-    'etc'
-    'examples'
-    'include'
-    'script'
-    'src'
-    'tests'
-    'tools'
-)
-readonly OT_SPELL_CHECK_DIRS
-
-main()
-{
-    if [ $# == 0 ]; then
-        codespell "${OT_SPELL_CHECK_DIRS[@]}" -w --ignore-words="${OT_SPELL_CHECK_IGNORE_CONFIG_FILE}"
-    elif [ "$1" == 'check' ]; then
-        codespell "${OT_SPELL_CHECK_DIRS[@]}" --ignore-words="${OT_SPELL_CHECK_IGNORE_CONFIG_FILE}"
-    else
-        echo >&2 "Unsupported option: $1. Supported: check"
-        # 128 for Invalid arguments
-        exit 128
-    fi
-}
-
-main "$@"