diff --git a/.cspell.json b/.cspell.json
new file mode 100644
index 000000000000..388ccce2b091
--- /dev/null
+++ b/.cspell.json
@@ -0,0 +1,27 @@
+{
+    "allowCompoundWords": true,
+    "dictionaries": ["cpp", "rust-extra", "rustc_codegen_gcc"],
+    "dictionaryDefinitions": [
+        {
+            "name": "rust-extra",
+            "path": "tools/cspell_dicts/rust.txt",
+            "addWords": true
+        },
+        {
+            "name": "rustc_codegen_gcc",
+            "path": "tools/cspell_dicts/rustc_codegen_gcc.txt",
+            "addWords": true
+        }
+    ],
+    "files": [
+        "src/**/*.rs"
+    ],
+    "ignorePaths": [
+        "src/intrinsic/archs.rs",
+        "src/intrinsic/llvm.rs"
+    ],
+    "ignoreRegExpList": [
+        "/(FIXME|NOTE|TODO)\\([^)]+\\)/",
+        "__builtin_\\w*"
+    ]
+}
diff --git a/tools/cspell_dicts/rust.txt b/tools/cspell_dicts/rust.txt
new file mode 100644
index 000000000000..379cbd77eef0
--- /dev/null
+++ b/tools/cspell_dicts/rust.txt
@@ -0,0 +1,2 @@
+lateout
+repr
diff --git a/tools/cspell_dicts/rustc_codegen_gcc.txt b/tools/cspell_dicts/rustc_codegen_gcc.txt
new file mode 100644
index 000000000000..31023e50ffa1
--- /dev/null
+++ b/tools/cspell_dicts/rustc_codegen_gcc.txt
@@ -0,0 +1,75 @@
+aapcs
+addo
+archs
+ashl
+ashr
+cgcx
+clzll
+cmse
+codegened
+csky
+ctlz
+ctpop
+cttz
+ctzll
+flto
+fmaximumf
+fmuladd
+fmuladdf
+fminimumf
+fmul
+fptosi
+fptosui
+fptoui
+fwrapv
+gimple
+hrtb
+immediates
+liblto
+llbb
+llcx
+llextra
+llfn
+lgcc
+llmod
+llresult
+llret
+ltrans
+llty
+llval
+llvals
+loong
+lshr
+masm
+maximumf
+maxnumf
+mavx
+mcmodel
+minimumf
+minnumf
+monomorphization
+monomorphizations
+monomorphized
+monomorphizing
+movnt
+mulo
+nvptx
+pointee
+powitf
+reassoc
+riscv
+rlib
+roundevenf
+rustc
+sitofp
+sizet
+spir
+subo
+sysv
+tbaa
+uitofp
+unord
+uninlined
+utrunc
+xabort
+zext