diff --git a/.github/scripts/check_icon_pr.py b/.github/scripts/check_icon_pr.py
index 301b4dd8..662c8c99 100644
--- a/.github/scripts/check_icon_pr.py
+++ b/.github/scripts/check_icon_pr.py
@@ -67,6 +67,24 @@ def check_devicon_object(icon: dict):
     :return a string containing the error messages if any.
     """
     err_msgs = []
+
+    try:
+        if type(icon["name"]) != str:
+            err_msgs.append("- Property \"name\" value must be type string.")
+    except KeyError:
+        err_msgs.append("- Missing property key: \"name\".")
+
+    try:
+        for altname in icon["altnames"]:
+            if type(altname) != str:
+                raise TypeError()
+            if altname == icon["name"]:
+                err_msgs.append(f"- \"altnames\" should not contain the same name as \"name\" property. Please remove \"{altname}\" from \"altnames\"")
+    except TypeError:
+        err_msgs.append("- \"altnames\" must be an array of strings, not: " + str(icon["altnames"]))
+    except KeyError:
+        err_msgs.append("- Missing property key: \"altnames\".")
+
     try:
         for tag in icon["tags"]:
             if type(tag) != str:
@@ -110,12 +128,37 @@ def check_devicon_object(icon: dict):
 
     try:
         if type(icon["aliases"]) != list:
-            err_msgs.append("- 'aliases' must be an array.")
+            err_msgs.append("- \"aliases\" must be an array of objects.")
     except KeyError:
         err_msgs.append("- missing key: 'aliases'.")
-    
+
+    try:
+        for alias_objects in icon["aliases"]:
+            if type(alias_objects) != dict:
+                raise TypeError()
+    except TypeError:
+        err_msgs.append("- \"aliases\" must be an array of objects, not: " + str(icon["aliases"]))
+
+    try:
+        for alias_objects in icon["aliases"]:
+            if type(alias_objects["base"]) != str:
+                err_msgs.append("- must contain at least 1 base in aliases.")
+            if not util.is_svg_version_valid(alias_objects['base']):
+                err_msgs.append(f"- Invalid base name in aliases[\"base\"]: \"{alias_objects['base']}\". Must match regexp: (original|plain|line)(-wordmark)?")
+    except KeyError:
+        err_msgs.append("- missing key: \"base\" in \"aliases\".")
+
+    try:
+        for alias_objects in icon["aliases"]:
+            if type(alias_objects["alias"]) != str:
+                err_msgs.append("- must contain at least 1 alias in aliases.")
+            if not util.is_svg_version_valid(alias_objects['alias']):
+                err_msgs.append(f"- Invalid alias name in aliases['alias']: \"{alias_objects['alias']}\". Must match regexp: (original|plain|line)(-wordmark)?")
+    except KeyError:
+        err_msgs.append("- missing key: \"alias\" in \"aliases\".")
+
     if len(err_msgs) > 0:
-        message = "Error found in 'devicon.json' for '{}' entry: \n{}".format(icon["name"], "\n".join(err_msgs))
+        message = "Error found in \"devicon.json\" for \"{}\" entry: \n{}".format(icon["name"], "\n".join(err_msgs))
         return message
     return ""