diff --git a/nettacker/api/engine.py b/nettacker/api/engine.py
index 9979e05b..e5475968 100644
--- a/nettacker/api/engine.py
+++ b/nettacker/api/engine.py
@@ -374,10 +374,12 @@ def get_results():
 @app.route("/results/get", methods=["GET"])
 def get_result_content():
     """
-    get a result HTML/TEXT/JSON content
-
+    Retrieve the raw scan result content for a given report id and return it as an HTTP response.
+    
+    Validates the API key on the incoming request. If the "id" parameter is missing, responds with HTTP 400; if the report cannot be retrieved, responds with HTTP 500.
+    
     Returns:
-        content of the scan result
+        Response: HTTP response whose body is the scan file content, with the MIME type determined from the file extension and a `Content-Disposition` attachment filename header.
     """
     api_key_is_valid(app, flask_request)
     scan_id = get_value(flask_request, "id")
@@ -392,7 +394,7 @@ def get_result_content():
     return Response(
         file_content,
         mimetype=mime_types().get(os.path.splitext(filename)[1], "text/plain"),
-        headers={"Content-Disposition": "attachment;filename=" + filename.split("/")[-1]},
+        headers={"Content-Disposition": "attachment;filename=" + os.path.basename(filename)},
     )
 
 
@@ -612,4 +614,4 @@ def start_api_server(options):
         except KeyboardInterrupt:
             for process in multiprocessing.active_children():
                 process.terminate()
-            break
+            break
\ No newline at end of file
diff --git a/nettacker/core/arg_parser.py b/nettacker/core/arg_parser.py
index e8aed121..210280c5 100644
--- a/nettacker/core/arg_parser.py
+++ b/nettacker/core/arg_parser.py
@@ -43,48 +43,52 @@ class ArgParser(ArgumentParser):
     @staticmethod
     def load_graphs():
         """
-        load all available graphs
-
+        Discover available graph engine names.
+        
         Returns:
-            an array of graph names
+            graph_names (list[str]): Unique graph identifiers found under the graph directory, formatted as "<directory>_graph".
         """
 
         graph_names = []
         for graph_library in Config.path.graph_dir.glob("*/engine.py"):
-            graph_names.append(str(graph_library).split("/")[-2] + "_graph")
+            graph_names.append(graph_library.parent.name + "_graph")
         return list(set(graph_names))
 
     @staticmethod
     def load_languages():
         """
-        Get available languages
-
+        Discover available language identifiers by scanning the locale directory for YAML files.
+        
         Returns:
-            an array of languages
+            list[str]: Unique language names derived from locale file stems (order not guaranteed).
         """
         languages_list = []
 
         for language in Config.path.locale_dir.glob("*.yaml"):
-            languages_list.append(str(language).split("/")[-1].split(".")[0])
+            languages_list.append(language.stem)
 
         return list(set(languages_list))
 
     @staticmethod
     def load_modules(limit=-1, full_details=False):
         """
-        load all available modules
-
-        limit: return limited number of modules
-        full: with full details
-
+        Load available scanning modules from the configured modules directory.
+        
+        Parameters:
+        	limit (int): Maximum number of modules to return; -1 means no limit. If the limit is reached a "..." placeholder will be inserted.
+        	full_details (bool): If True, include each module's parsed `info` mapping as the value; otherwise the value will be None.
+        
         Returns:
-            an array of all module names
+        	dict: Mapping of module keys ("<library>_<category>") to either their `info` dict (when full_details is True) or None. Always includes an "all" entry and may include a "..." placeholder when truncated.
+        
+        Notes:
+        	This function also updates the module severity and description cache (all_module_severity_and_desc) for each discovered module.
         """
         # Search for Modules
         module_names = {}
         for module_name in sorted(Config.path.modules_dir.glob("**/*.yaml")):
-            library = str(module_name).split("/")[-1].split(".")[0]
-            category = str(module_name).split("/")[-2]
+            library = module_name.stem
+            category = module_name.parent.name
             module = f"{library}_{category}"
             contents = yaml.safe_load(TemplateLoader(module).open().split("payload:")[0])
             module_names[module] = contents["info"] if full_details else None
@@ -763,4 +767,4 @@ class ArgParser(ArgumentParser):
         options.time_sleep_between_requests = float(options.time_sleep_between_requests)
         options.retries = int(options.retries)
 
-        self.arguments = options
+        self.arguments = options
\ No newline at end of file
diff --git a/nettacker/core/messages.py b/nettacker/core/messages.py
index 9f07cb73..c6599da7 100644
--- a/nettacker/core/messages.py
+++ b/nettacker/core/messages.py
@@ -25,15 +25,17 @@ def load_yaml(filename):
 
 def get_languages():
     """
-    Get available languages
-
+    Return a deduplicated list of available locale identifiers.
+    
+    Scans Config.path.locale_dir for files with a .yaml extension and collects each file's stem (filename without extension) as a language identifier.
+    
     Returns:
-        an array of languages
+        languages (list[str]): List of unique language codes derived from locale YAML filenames.
     """
     languages_list = []
 
     for language in Config.path.locale_dir.glob("*.yaml"):
-        languages_list.append(str(language).split("/")[-1].split(".")[0])
+        languages_list.append(language.stem)
     return list(set(languages_list))
 
 
@@ -68,4 +70,4 @@ def messages(msg_id):
         the message content in the selected language if
         message found otherwise return message in English
     """
-    return message_cache[str(msg_id)]
+    return message_cache[str(msg_id)]
\ No newline at end of file
diff --git a/nettacker/core/template.py b/nettacker/core/template.py
index ab620723..6cdba32e 100644
--- a/nettacker/core/template.py
+++ b/nettacker/core/template.py
@@ -28,15 +28,29 @@ class TemplateLoader:
         return module_content
 
     def open(self):
+        """
+        Return the contents of the YAML module file identified by this loader's name.
+        
+        The name is split on underscores to derive an action (last segment) and a library (remaining segments joined with underscores); the file at Config.path.modules_dir / action / f"{library}.yaml" is opened with UTF-8 encoding and its full text is returned.
+        
+        Returns:
+            str: The raw text of the YAML file.
+        """
         module_name_parts = self.name.split("_")
         action = module_name_parts[-1]
         library = "_".join(module_name_parts[:-1])
 
-        with open(Config.path.modules_dir / action / f"{library}.yaml") as yaml_file:
+        with open(Config.path.modules_dir / action / f"{library}.yaml", encoding="utf-8") as yaml_file:
             return yaml_file.read()
 
     def format(self):
+        """
+        Render the module's YAML template by applying the instance's inputs as format placeholders.
+        
+        Returns:
+            formatted (str): The template string produced by calling `open()` and applying `str.format` with `self.inputs`.
+        """
         return self.open().format(**self.inputs)
 
     def load(self):
-        return self.parse(yaml.safe_load(self.format()), self.inputs)
+        return self.parse(yaml.safe_load(self.format()), self.inputs)
\ No newline at end of file
diff --git a/nettacker/core/utils/common.py b/nettacker/core/utils/common.py
index 6418bbb9..6a8e6b81 100644
--- a/nettacker/core/utils/common.py
+++ b/nettacker/core/utils/common.py
@@ -165,6 +165,16 @@ def find_args_value(args_name):
 
 
 def re_address_repeaters_key_name(key_name):
+    # Note: This uses "/" as a key delimiter, not a file path separator
+    """
+    Format a slash-delimited key path into a sequence of dictionary-access segments excluding the final key.
+    
+    Parameters:
+        key_name (str): A "/"-delimited key path ("/" is a key delimiter, not a filesystem separator).
+    
+    Returns:
+        str: Concatenated "['key']" segments for every component of `key_name` except the last; returns an empty string if there are no components before the final segment.
+    """
     return "".join(["['" + _key + "']" for _key in key_name.split("/")[:-1]])
 
 
@@ -449,4 +459,4 @@ def generate_compare_filepath(scan_id):
     return "/report_compare_{date_time}_{scan_id}.json".format(
         date_time=now(format="%Y_%m_%d_%H_%M_%S"),
         scan_id=scan_id,
-    )
+    )
\ No newline at end of file