diff --git a/scripts/find_localised_strings.py b/scripts/find_localised_strings.py
index 74cfe1b4..b9d8a8b5 100644
--- a/scripts/find_localised_strings.py
+++ b/scripts/find_localised_strings.py
@@ -1,4 +1,6 @@
 """Search all given paths recursively for localised string calls."""
+from __future__ import annotations
+
 import argparse
 import ast
 import dataclasses
@@ -6,9 +8,6 @@ import json
 import pathlib
 import re
 import sys
-from typing import Optional
-
-# spell-checker: words dedupe deduping deduped
 
 
 def get_func_name(thing: ast.AST) -> str:
@@ -16,11 +15,9 @@ def get_func_name(thing: ast.AST) -> str:
     if isinstance(thing, ast.Name):
         return thing.id
 
-    elif isinstance(thing, ast.Attribute):
+    if isinstance(thing, ast.Attribute):
         return get_func_name(thing.value)
-
-    else:
-        return ''
+    return ''
 
 
 def get_arg(call: ast.Call) -> str:
@@ -31,10 +28,9 @@ def get_arg(call: ast.Call) -> str:
     arg = call.args[0]
     if isinstance(arg, ast.Constant):
         return arg.value
-    elif isinstance(arg, ast.Name):
+    if isinstance(arg, ast.Name):
         return f'VARIABLE! CHECK CODE! {arg.id}'
-    else:
-        return f'Unknown! {type(arg)=} {ast.dump(arg)} ||| {ast.unparse(arg)}'
+    return f'Unknown! {type(arg)=} {ast.dump(arg)} ||| {ast.unparse(arg)}'  # type: ignore
 
 
 def find_calls_in_stmt(statement: ast.AST) -> list[ast.Call]:
@@ -62,7 +58,7 @@ COMMENT_SAME_LINE_RE = re.compile(r'^.*?(#.*)$')
 COMMENT_OWN_LINE_RE = re.compile(r'^\s*?(#.*)$')
 
 
-def extract_comments(call: ast.Call, lines: list[str], file: pathlib.Path) -> Optional[str]:  # noqa: CCR001
+def extract_comments(call: ast.Call, lines: list[str], file: pathlib.Path) -> str | None:
     """
     Extract comments from source code based on the given call.
 
@@ -74,51 +70,32 @@ def extract_comments(call: ast.Call, lines: list[str], file: pathlib.Path) -> Op
     :param file: The path to the file this call node came from
     :return: The first comment that matches the rules, or None
     """
-    out: Optional[str] = None
-    above = call.lineno - 2
-    current = call.lineno - 1
+    above_line_number = call.lineno - 2
+    current_line_number = call.lineno - 1
 
-    above_line = lines[above].strip() if len(lines) >= above else None
-    above_comment: Optional[str] = None
-    current_line = lines[current].strip()
-    current_comment: Optional[str] = None
+    def extract_lang_comment(line: str) -> str | None:
+        """
+        Extract a language comment from a given line.
 
-    bad_comment: Optional[str] = None
-    if above_line is not None:
-        match = COMMENT_OWN_LINE_RE.match(above_line)
-        if match:
-            above_comment = match.group(1).strip()
-            if not above_comment.startswith('# LANG:'):
-                bad_comment = f'Unknown comment for {file}:{call.lineno} {above_line}'
-                above_comment = None
+        :param line: The line to extract the language comment from.
+        :return: The extracted language comment, or None if no valid comment is found.
+        """
+        match = COMMENT_OWN_LINE_RE.match(line)
+        if match and match.group(1).startswith('# LANG:'):
+            return match.group(1).replace('# LANG:', '').strip()
+        return None
 
-            else:
-                above_comment = above_comment.replace('# LANG:', '').strip()
+    above_comment = extract_lang_comment(lines[above_line_number]) if len(lines) >= above_line_number else None
+    current_comment = extract_lang_comment(lines[current_line_number])
 
-    if current_line is not None:
-        match = COMMENT_SAME_LINE_RE.match(current_line)
-        if match:
-            current_comment = match.group(1).strip()
-            if not current_comment.startswith('# LANG:'):
-                bad_comment = f'Unknown comment for {file}:{call.lineno} {current_line}'
-                current_comment = None
+    if current_comment is None:
+        current_comment = above_comment
 
-            else:
-                current_comment = current_comment.replace('# LANG:', '').strip()
+    if current_comment is None:
+        print(f'No comment for {file}:{call.lineno} {lines[current_line_number]}', file=sys.stderr)
+        return None
 
-    if current_comment is not None:
-        out = current_comment
-
-    elif above_comment is not None:
-        out = above_comment
-
-    elif bad_comment is not None:
-        print(bad_comment, file=sys.stderr)
-
-    if out is None:
-        print(f'No comment for {file}:{call.lineno} {current_line}', file=sys.stderr)
-
-    return out
+    return current_comment
 
 
 def scan_file(path: pathlib.Path) -> list[ast.Call]:
@@ -126,17 +103,19 @@ def scan_file(path: pathlib.Path) -> list[ast.Call]:
     data = path.read_text(encoding='utf-8')
     lines = data.splitlines()
     parsed = ast.parse(data)
-    out: list[ast.Call] = []
+    calls: list[ast.Call] = []
 
     for statement in parsed.body:
-        out.extend(find_calls_in_stmt(statement))
+        calls.extend(find_calls_in_stmt(statement))
 
-    # see if we can extract any comments
-    for call in out:
-        setattr(call, 'comment', extract_comments(call, lines, path))
+    # Extract and assign comments to each call
+    for call in calls:
+        call.comment = extract_comments(call, lines, path)  # type: ignore
 
-    out.sort(key=lambda c: c.lineno)
-    return out
+    # Sort the calls by line number
+    calls.sort(key=lambda c: c.lineno)
+
+    return calls
 
 
 def scan_directory(path: pathlib.Path, skip: list[pathlib.Path] | None = None) -> dict[pathlib.Path, list[ast.Call]]:
@@ -150,40 +129,34 @@ def scan_directory(path: pathlib.Path, skip: list[pathlib.Path] | None = None) -
     for thing in path.iterdir():
         if skip is not None and any(s.name == thing.name for s in skip):
             continue
-
         if thing.is_file():
             if not thing.name.endswith('.py'):
                 continue
-
             out[thing] = scan_file(thing)
-
         elif thing.is_dir():
-            out |= scan_directory(thing)
-
+            out |= scan_directory(thing)  # type: ignore
         else:
             raise ValueError(type(thing), thing)
-
     return out
 
 
-def parse_template(path) -> set[str]:
+def parse_template(path: pathlib.Path) -> set[str]:
     """
     Parse a lang.template file.
 
-    The regexp this uses was extracted from l10n.py.
+    The regular expression used here was extracted from l10n.py.
 
     :param path: The path to the lang file
     """
-    lang_re = re.compile(r'\s*"((?:[^"]|(?:\"))+)"\s*=\s*"((?:[^"]|(?:\"))+)"\s*;\s*$')
-    out = set()
+    lang_re = re.compile(r'\s*"([^"]+)"\s*=\s*"([^"]+)"\s*;\s*$')
+    result = set()
+
     for line in pathlib.Path(path).read_text(encoding='utf-8').splitlines():
         match = lang_re.match(line)
-        if not match:
-            continue
-        if match.group(1) != '!Language':
-            out.add(match.group(1))
+        if match and match.group(1) != '!Language':
+            result.add(match.group(1))
 
-    return out
+    return result
 
 
 @dataclasses.dataclass
@@ -193,8 +166,8 @@ class FileLocation:
     path: pathlib.Path
     line_start: int
     line_start_col: int
-    line_end: Optional[int]
-    line_end_col: Optional[int]
+    line_end: int | None
+    line_end_col: int | None
 
     @staticmethod
     def from_call(path: pathlib.Path, c: ast.Call) -> 'FileLocation':
@@ -213,50 +186,46 @@ class LangEntry:
 
     locations: list[FileLocation]
     string: str
-    comments: list[Optional[str]]
+    comments: list[str | None]
 
     def files(self) -> str:
         """Return a string representation of all the files this LangEntry is in, and its location therein."""
-        out = ''
-        for loc in self.locations:
-            start = loc.line_start
-            end = loc.line_end
-            end_str = f':{end}' if end is not None and end != start else ''
-            out += f'{loc.path.name}:{start}{end_str}; '
+        file_locations = [
+            f'{loc.path.name}:{loc.line_start}' +
+            (f':{loc.line_end}' if loc.line_end is not None and loc.line_end != loc.line_start else '')
+            for loc in self.locations
+        ]
 
-        return out
+        return '; '.join(file_locations)
 
 
 def dedupe_lang_entries(entries: list[LangEntry]) -> list[LangEntry]:
     """
     Deduplicate a list of lang entries.
 
-    This will coalesce LangEntries that have that same string but differing files and comments into a single
-    LangEntry that cotains all comments and FileLocations
+    This will coalesce LangEntries that have the same string but differing files and comments into a single
+    LangEntry that contains all comments and FileLocations.
 
     :param entries: The list to deduplicate
     :return: The deduplicated list
     """
-    deduped: list[LangEntry] = []
+    deduped: dict[str, LangEntry] = {}
+
     for e in entries:
-        cont = False
-        for d in deduped:
-            if d.string == e.string:
-                cont = True
-                d.locations.append(e.locations[0])
-                d.comments.extend(e.comments)
+        existing = deduped.get(e.string)
+        if existing:
+            existing.locations.extend(e.locations)
+            existing.comments.extend(e.comments)
+        else:
+            deduped[e.string] = LangEntry(locations=e.locations[:], string=e.string, comments=e.comments[:])
 
-        if cont:
-            continue
-
-        deduped.append(e)
-
-    return deduped
+    return list(deduped.values())
 
 
 def generate_lang_template(data: dict[pathlib.Path, list[ast.Call]]) -> str:
     """Generate a full en.template from the given data."""
     entries: list[LangEntry] = []
+
     for path, calls in data.items():
         for c in calls:
             entries.append(LangEntry([FileLocation.from_call(path, c)], get_arg(c), [getattr(c, 'comment')]))
@@ -267,30 +236,72 @@ def generate_lang_template(data: dict[pathlib.Path, list[ast.Call]]) -> str:
 
 '''
     print(f'Done Deduping entries {len(entries)=}  {len(deduped)=}', file=sys.stderr)
+
     for entry in deduped:
         assert len(entry.comments) == len(entry.locations)
-        comment = ''
-        files = 'In files: ' + entry.files()
+        comment_parts = []
         string = f'"{entry.string}"'
 
-        for i in range(len(entry.comments)):
-            if entry.comments[i] is None:
+        for i, comment_text in enumerate(entry.comments):
+            if comment_text is None:
                 continue
 
             loc = entry.locations[i]
-            to_append = f'{loc.path.name}: {entry.comments[i]}; '
-            if to_append not in comment:
-                comment += to_append
+            comment_parts.append(f'{loc.path.name}: {comment_text};')
 
-        header = f'{comment.strip()} {files}'.strip()
-        out += f'/* {header} */\n'
-        out += f'{string} = {string};\n'
-        out += '\n'
+        if comment_parts:
+            header = ' '.join(comment_parts)
+            out += f'/* {header} */\n'
+
+        out += f'{string} = {string};\n\n'
 
     return out
 
 
-if __name__ == '__main__':
+def compare_lang_with_template(template: set[str], res: dict[pathlib.Path, list[ast.Call]]) -> None:
+    """
+    Compare language entries in source code with a given language template.
+
+    :param template: A set of language entries from a language template.
+    :param res: A dictionary containing source code paths as keys and lists of ast.Call objects as values.
+    """
+    seen = set()
+
+    for file, calls in res.items():
+        for c in calls:
+            arg = get_arg(c)
+            if arg in template:
+                seen.add(arg)
+            else:
+                print(f'NEW! {file}:{c.lineno}: {arg!r}')
+
+    for old in set(template) ^ seen:
+        print(f'No longer used: {old}')
+
+
+def print_json_output(res: dict[pathlib.Path, list[ast.Call]]) -> None:
+    """
+    Print JSON output of extracted language entries.
+
+    :param res: A dictionary containing source code paths as keys and lists of ast.Call objects as values.
+    """
+    to_print_data = [
+        {
+            'path': str(path),
+            'string': get_arg(c),
+            'reconstructed': ast.unparse(c),  # type: ignore
+            'start_line': c.lineno,
+            'start_offset': c.col_offset,
+            'end_line': c.end_lineno,
+            'end_offset': c.end_col_offset,
+            'comment': getattr(c, 'comment', None)
+        } for (path, calls) in res.items() for c in calls
+    ]
+
+    print(json.dumps(to_print_data, indent=2))
+
+
+if __name__ == "__main__":
     parser = argparse.ArgumentParser()
     parser.add_argument('--directory', help='Directory to search from', default='.')
     parser.add_argument('--ignore', action='append', help='directories to ignore', default=['venv', '.venv', '.git'])
@@ -302,56 +313,32 @@ if __name__ == '__main__':
     args = parser.parse_args()
 
     directory = pathlib.Path(args.directory)
-    res = scan_directory(directory, [pathlib.Path(p) for p in args.ignore])
+    skip = [pathlib.Path(p) for p in args.ignore]
+    res = scan_directory(directory, skip)
 
-    if args.compare_lang is not None and len(args.compare_lang) > 0:
-        seen = set()
+    if args.compare_lang:
         template = parse_template(args.compare_lang)
-
-        for file, calls in res.items():
-            for c in calls:
-                arg = get_arg(c)
-                if arg in template:
-                    seen.add(arg)
-                else:
-                    print(f'NEW! {file}:{c.lineno}: {arg!r}')
-
-        for old in set(template) ^ seen:
-            print(f'No longer used: {old}')
+        compare_lang_with_template(template, res)
 
     elif args.json:
-        to_print_data = [
-            {
-                'path': str(path),
-                'string': get_arg(c),
-                'reconstructed': ast.unparse(c),
-                'start_line': c.lineno,
-                'start_offset': c.col_offset,
-                'end_line': c.end_lineno,
-                'end_offset': c.end_col_offset,
-                'comment': getattr(c, 'comment', None)
-            } for (path, calls) in res.items() for c in calls
-        ]
-
-        print(json.dumps(to_print_data, indent=2))
+        print_json_output(res)
 
     elif args.lang:
         if args.lang == '-':
             print(generate_lang_template(res))
-
         else:
             with open(args.lang, mode='w+', newline='\n') as langfile:
                 langfile.writelines(generate_lang_template(res))
 
     else:
         for path, calls in res.items():
-            if len(calls) == 0:
+            if not calls:
                 continue
 
             print(path)
             for c in calls:
                 print(
-                    f'    {c.lineno:4d}({c.col_offset:3d}):{c.end_lineno:4d}({c.end_col_offset:3d})\t', ast.unparse(c)
+                    f'    {c.lineno:4d}({c.col_offset:3d}):{c.end_lineno:4d}('
+                    f'{c.end_col_offset:3d})\t', ast.unparse(c)  # type: ignore
                 )
-
             print()
diff --git a/scripts/killswitch_test.py b/scripts/killswitch_test.py
index b85b341e..cef93c88 100644
--- a/scripts/killswitch_test.py
+++ b/scripts/killswitch_test.py
@@ -116,9 +116,14 @@ if __name__ == '__main__':
     if file_name == '-':
         file = sys.stdin
     else:
-        file = open(file_name)
-
-    res = json.load(file)
-    file.close()
+        try:
+            with open(file_name) as file:
+                res = json.load(file)
+        except FileNotFoundError:
+            print(f"File '{file_name}' not found.")
+            sys.exit(1)
+        except json.JSONDecodeError:
+            print(f"Error decoding JSON in '{file_name}'.")
+            sys.exit(1)
 
     show_killswitch_set_info(KillSwitchSet(parse_kill_switches(res)))
diff --git a/scripts/pip_rev_deps.py b/scripts/pip_rev_deps.py
index b97757d5..8a187172 100644
--- a/scripts/pip_rev_deps.py
+++ b/scripts/pip_rev_deps.py
@@ -1,11 +1,10 @@
-#!/usr/bin/env python
-"""Find the reverse dependencies of a package according to pip."""
+"""Search for dependencies given a package."""
 import sys
 
 import pkg_resources
 
 
-def find_reverse_deps(package_name: str):
+def find_reverse_deps(package_name: str) -> list[str]:
     """
     Find the packages that depend on the named one.
 
@@ -19,4 +18,16 @@ def find_reverse_deps(package_name: str):
 
 
 if __name__ == '__main__':
-    print(find_reverse_deps(sys.argv[1]))
+    if len(sys.argv) != 2:
+        print("Usage: python reverse_deps.py <package_name>")
+        sys.exit(1)
+
+    package_name = sys.argv[1]
+    reverse_deps = find_reverse_deps(package_name)
+
+    if reverse_deps:
+        print(f"Reverse dependencies of '{package_name}':")
+        for dep in reverse_deps:
+            print(dep)
+    else:
+        print(f"No reverse dependencies found for '{package_name}'.")