diff --git a/.taskfiles/pre-commit.yml b/.taskfiles/pre-commit.yml
index 136f852a5b..f2e488e815 100644
--- a/.taskfiles/pre-commit.yml
+++ b/.taskfiles/pre-commit.yml
@@ -73,7 +73,7 @@ tasks:
       - task: gitleaks
 
   install:
-    desc: "Install the pinned pre-commit Python tools (ruff, codespell, toml-sort)"
+    desc: "Install the pinned pre-commit Python tools"
     run: once
     cmds:
       - uv sync --project scripts/pre-commit --locked
@@ -112,7 +112,7 @@ tasks:
   toml-sort:
     deps: [install]
     cmds:
-      - uv run --project scripts/pre-commit --no-sync toml-sort --all --ignore-case {{if .FIX}}--in-place{{else}}--check{{end}} {{.LOCALE_TOML}}
+      - uv run --project scripts/pre-commit --no-sync python scripts/pre-commit/sort_locale_toml.py {{if .FIX}}--fix {{end}}{{.LOCALE_TOML}}
 
   whitespace:
     cmds:
diff --git a/frontend/editor/public/locales/en-US/translation.toml b/frontend/editor/public/locales/en-US/translation.toml
index 913cdf20a4..abbe1446ff 100644
--- a/frontend/editor/public/locales/en-US/translation.toml
+++ b/frontend/editor/public/locales/en-US/translation.toml
@@ -692,7 +692,6 @@ manualLinks = "Manual downloads: click the links and place the files into the te
 noLanguages = "No tessdata languages found in the configured directory."
 permissionNotice = "The tessdata path is not writable. Downloads will be opened in the browser; please save the .traineddata files manually into the tessdata folder."
 
-# AI engine admin settings (AI nav group)
 [admin.settings.ai.documents]
 description = "Configure the embedding model and retrieval settings used to answer questions over documents. Applied to the AI engine when saved."
 title = "Documents & RAG"
@@ -7320,7 +7319,6 @@ sectionsAriaLabel = "Infrastructure sections"
 subtitle = "Deployments, credentials, security posture, storage, and the audit trail for your Stirling workspace."
 title = "Infrastructure"
 
-# Fixed-enum label maps rendered via t(MAP[value]) in the infrastructure tabs.
 [portal.infrastructure.apiKeys]
 createKey = "Create key"
 heading = "API keys"
@@ -8415,13 +8413,10 @@ region = "State / region"
 regionPlaceholder = "California"
 running = "{{annual}} / yr · {{years}}-yr {{tcv}}"
 s1Sub = "Your team, and the PDFs you expect to run each year."
-# Step 1 — volume
 s1Title = "How much will you process?"
 s2Sub = "Longer terms discount the rate; your service level sets support."
-# Step 2 — commitment & service
 s2Title = "Commitment and service"
 s3Sub = "For the quote and the agreement it generates."
-# Step 3 — details
 s3Title = "Your details"
 serviceLevel = "Service level"
 size_compact = "Compact"
diff --git a/scripts/pre-commit/pyproject.toml b/scripts/pre-commit/pyproject.toml
index cd13b56f5e..9a730bdcb5 100644
--- a/scripts/pre-commit/pyproject.toml
+++ b/scripts/pre-commit/pyproject.toml
@@ -9,7 +9,7 @@ requires-python = ">=3.11"
 dependencies = [
     "ruff==0.15.14",
     "codespell==2.4.2",
-    "toml-sort==0.24.4",
+    "tomli-w==1.2.0",
 ]
 
 [tool.uv]
diff --git a/scripts/pre-commit/sort_locale_toml.py b/scripts/pre-commit/sort_locale_toml.py
new file mode 100644
index 0000000000..1515fe2cfe
--- /dev/null
+++ b/scripts/pre-commit/sort_locale_toml.py
@@ -0,0 +1,96 @@
+#!/usr/bin/env python3
+"""Key-sort the locale translation.toml files.
+
+python sort_locale_toml.py <pathspec>...         # check: report, exit 1 if unsorted
+python sort_locale_toml.py --fix <pathspec>...   # fix: rewrite in place
+"""
+
+from __future__ import annotations
+
+import subprocess
+import sys
+import tomllib
+from pathlib import Path
+
+import tomli_w
+
+
+class SortError(Exception):
+    """A file could not be sorted without risking its contents."""
+
+
+def ordered(table: dict[str, object]) -> dict[str, object]:
+    """Rebuild a table with its keys sorted, and sub-tables after its own keys."""
+    keys = {key: value for key, value in table.items() if not isinstance(value, dict)}
+    subtables = {key: value for key, value in table.items() if isinstance(value, dict)}
+    result: dict[str, object] = {key: keys[key] for key in sorted(keys, key=str.lower)}
+    for key in sorted(subtables, key=str.lower):
+        result[key] = ordered(subtables[key])
+    return result
+
+
+def tracked_files(path_specs: list[str]) -> list[str]:
+    result = subprocess.run(
+        ["git", "ls-files", "-z", *path_specs],
+        check=True,
+        capture_output=True,
+        text=True,
+    )
+    return [path for path in result.stdout.split("\0") if path]
+
+
+def sort_file(path: str, fix: bool) -> bool:
+    """Rewrite one file if `fix`; return whether it was not already sorted."""
+    text = Path(path).read_text(encoding="utf-8")
+    try:
+        original = tomllib.loads(text)
+    except tomllib.TOMLDecodeError as exc:
+        raise SortError(f"{path}: invalid TOML: {exc}") from exc
+
+    expected = tomli_w.dumps(ordered(original))
+    if expected == text:
+        return False
+
+    try:
+        reordered = tomllib.loads(expected)
+    except tomllib.TOMLDecodeError as exc:
+        raise SortError(
+            f"{path}: refusing to sort, the sorted output is not valid TOML: {exc}"
+        ) from exc
+    if reordered != original:
+        raise SortError(
+            f"{path}: refusing to sort, sorting would change the file's contents"
+        )
+
+    if fix:
+        Path(path).write_text(expected, encoding="utf-8")
+    return True
+
+
+def main() -> int:
+    args = sys.argv[1:]
+    fix = "--fix" in args
+    pathspecs = [a for a in args if a != "--fix"]
+
+    offenders: list[str] = []
+    errors: list[str] = []
+    for path in tracked_files(pathspecs):
+        try:
+            if sort_file(path, fix):
+                offenders.append(path)
+        except SortError as exc:
+            errors.append(str(exc))
+
+    for error in errors:
+        print(error, file=sys.stderr)
+    if offenders and not fix:
+        print(f"{len(offenders)} file(s) need TOML sorting:")
+        for path in offenders:
+            print(f"  {path}")
+    if offenders and fix:
+        print(f"Sorted TOML in {len(offenders)} file(s).")
+    return 1 if errors or (offenders and not fix) else 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())
diff --git a/scripts/pre-commit/uv.lock b/scripts/pre-commit/uv.lock
index b90593a6e8..2a3c8ee11d 100644
--- a/scripts/pre-commit/uv.lock
+++ b/scripts/pre-commit/uv.lock
@@ -43,33 +43,21 @@ source = { virtual = "." }
 dependencies = [
     { name = "codespell" },
     { name = "ruff" },
-    { name = "toml-sort" },
+    { name = "tomli-w" },
 ]
 
 [package.metadata]
 requires-dist = [
     { name = "codespell", specifier = "==2.4.2" },
     { name = "ruff", specifier = "==0.15.14" },
-    { name = "toml-sort", specifier = "==0.24.4" },
+    { name = "tomli-w", specifier = "==1.2.0" },
 ]
 
 [[package]]
-name = "toml-sort"
-version = "0.24.4"
+name = "tomli-w"
+version = "1.2.0"
 source = { registry = "https://pypi.org/simple" }
-dependencies = [
-    { name = "tomlkit" },
-]
-sdist = { url = "https://files.pythonhosted.org/packages/47/c5/d6f650fdcf8e1f83096815fa67fb13a9a345b99da6015c60c4b7e4a8ea2b/toml_sort-0.24.4.tar.gz", hash = "sha256:429b69f5b98b7047a11380c80ecf0838556bdea1a8902d0be564961c48841423", size = 17793, upload-time = "2026-03-24T14:05:53.637Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/19/75/241269d1da26b624c0d5e110e8149093c759b7a286138f4efd61a60e75fe/tomli_w-1.2.0.tar.gz", hash = "sha256:2dd14fac5a47c27be9cd4c976af5a12d87fb1f0b4512f81d69cce3b35ae25021", size = 7184, upload-time = "2025-01-15T12:07:24.262Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/0f/5a/1f0e54df4eacf0f4d8f94ba50cf72be33d2a3f04babdfb1931bead48a0ab/toml_sort-0.24.4-py3-none-any.whl", hash = "sha256:125aa5fb94f33c542c6901040456145dd38f79bbb310b56b436a93057d30a739", size = 16577, upload-time = "2026-03-24T14:05:54.757Z" },
-]
-
-[[package]]
-name = "tomlkit"
-version = "0.15.0"
-source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/51/db/03eaf4331631ef6b27d6e3c9b68c54dc6f0d63d87201fed600cc409307fd/tomlkit-0.15.0.tar.gz", hash = "sha256:7d1a9ecba3086638211b13814ea79c90dd54dd11993564376f3aa92271f5c7a3", size = 161875, upload-time = "2026-05-10T07:38:22.245Z" }
-wheels = [
-    { url = "https://files.pythonhosted.org/packages/6a/43/8bd850ee71a191bf072e31302c73a66be413fecdd98fdcd111ecbcce13ca/tomlkit-0.15.0-py3-none-any.whl", hash = "sha256:4dbc8f0fc024412b57ced8757ac7461305126a648ff8c2c807fcb8e133a78738", size = 41328, upload-time = "2026-05-10T07:38:23.517Z" },
+    { url = "https://files.pythonhosted.org/packages/c7/18/c86eb8e0202e32dd3df50d43d7ff9854f8e0603945ff398974c1d91ac1ef/tomli_w-1.2.0-py3-none-any.whl", hash = "sha256:188306098d013b691fcadc011abd66727d3c414c571bb01b1a174ba8c983cf90", size = 6675, upload-time = "2025-01-15T12:07:22.074Z" },
 ]