Hey, I try to have both the keyboards I use BR and US. So I added both and clear the issue with the README.MD.

README.md

@@ -6,10 +6,22 @@ Currently it only supports 2 layouts (the ones I use)
 
 #### Layout supported
 
+    - US Qwerty
     - US ALT INT
     - US Colemak-DH
     - IT
     - ES
     - FR
     - PL
+    - PT-BR
     - DE
+    - JP 
+    - HEB
+    - RU
+    - SE 
+    - SLV
+    - CH 
+    - ALB
+    - BLR 
+    - DK
+    - NL

main.py

@@ -19,6 +19,8 @@ def on_event(self, event, extension):
         query = event.get_query().strip()
         if query == extension.preferences['kus']:
             subprocess.Popen(['setxkbmap', 'us', '-variant', 'alt-intl'])
+        if query == extension.preferences['kusa']:
+            subprocess.Popen(['setxkbmap', 'us'])
         elif query == extension.preferences['kit']:
             subprocess.Popen(['setxkbmap', 'it'])
         elif query == extension.preferences['kes']:
@@ -53,8 +55,10 @@ def on_event(self, event, extension):
             subprocess.Popen(['setxkbmap', 'da'])
         elif query == extension.preferences['nl']:
             subprocess.Popen(['setxkbmap', 'nl'])
+        elif query == extension.preferences['kbr']:
+            subprocess.Popen(['setxkbmap', 'br'])
         return HideWindowAction()
-        
+
 
 if __name__ == '__main__':
     KeyboardLayoutChange().run()

manifest.json

@@ -96,7 +96,7 @@
       "id": "ch",
       "type": "keyword",
       "name": "ch",
-      "description": "Switch to ch iso keyboard layout",
+      "description": "Switch to Switzerland iso keyboard layout",
       "default_value": "ch"
     },
     {
@@ -126,6 +126,20 @@
       "name": "nl",
       "description": "Switch to Dutch iso keyboard layout",
       "default_value": "nl"
+    },
+    {
+      "id": "kusa",
+      "type": "keyword",
+      "name": "kusa",
+      "description": "Switch to Qwerty US iso keyboard layout",
+      "default_value": "kusa"
+    },
+    {
+      "id": "kbr",
+      "type": "keyword",
+      "name": "kbr",
+      "description": "Switch to Qwerty Brazillian iso keyboard layout",
+      "default_value": "kbr"
     }
   ]
 }