diff --git a/_includes/api/en/4x/app-param.md b/_includes/api/en/4x/app-param.md
index 0984722e1..2b0d8bf2a 100644
--- a/_includes/api/en/4x/app-param.md
+++ b/_includes/api/en/4x/app-param.md
@@ -22,7 +22,7 @@ app.param('user', function (req, res, next, id) {
 })
 ```
 
-Param callback functions are local to the router on which they are defined. They are not inherited by mounted apps or routers. Hence, param callbacks defined on `app` will be triggered only by route parameters defined on `app` routes.
+Param callback functions are local to the router on which they are defined. They are not inherited by mounted apps or routers, nor are they triggered for route parameters inherited from parent routers. Hence, param callbacks defined on `app` will be triggered only by route parameters defined on `app` routes.
 
 All param callbacks will be called before any handler of any route in which the param occurs, and they will each be called only once in a request-response cycle, even if the parameter is matched in multiple routes, as shown in the following examples.
 
diff --git a/_includes/api/en/4x/router-param.md b/_includes/api/en/4x/router-param.md
index 3fe0083bd..20b35d1af 100644
--- a/_includes/api/en/4x/router-param.md
+++ b/_includes/api/en/4x/router-param.md
@@ -32,7 +32,7 @@ router.param('user', function (req, res, next, id) {
 })
 ```
 
-Param callback functions are local to the router on which they are defined. They are not inherited by mounted apps or routers. Hence, param callbacks defined on `router` will be triggered only by route parameters defined on `router` routes.
+Param callback functions are local to the router on which they are defined. They are not inherited by mounted apps or routers, nor are they triggered for route parameters inherited from parent routers. Hence, param callbacks defined on `router` will be triggered only by route parameters defined on `router` routes.
 
 A param callback will be called only once in a request-response cycle, even if the parameter is matched in multiple routes, as shown in the following examples.
 
diff --git a/_includes/api/en/5x/app-param.md b/_includes/api/en/5x/app-param.md
index dd8b1ad97..a1e064add 100644
--- a/_includes/api/en/5x/app-param.md
+++ b/_includes/api/en/5x/app-param.md
@@ -22,7 +22,7 @@ app.param('user', (req, res, next, id) => {
 })
 ```
 
-Param callback functions are local to the router on which they are defined. They are not inherited by mounted apps or routers. Hence, param callbacks defined on `app` will be triggered only by route parameters defined on `app` routes.
+Param callback functions are local to the router on which they are defined. They are not inherited by mounted apps or routers, nor are they triggered for route parameters inherited from parent routers. Hence, param callbacks defined on `app` will be triggered only by route parameters defined on `app` routes.
 
 All param callbacks will be called before any handler of any route in which the param occurs, and they will each be called only once in a request-response cycle, even if the parameter is matched in multiple routes, as shown in the following examples.
 
diff --git a/_includes/api/en/5x/router-param.md b/_includes/api/en/5x/router-param.md
index aaa1c6d61..f2b11d894 100644
--- a/_includes/api/en/5x/router-param.md
+++ b/_includes/api/en/5x/router-param.md
@@ -32,7 +32,7 @@ router.param('user', (req, res, next, id) => {
 })
 ```
 
-Param callback functions are local to the router on which they are defined. They are not inherited by mounted apps or routers. Hence, param callbacks defined on `router` will be triggered only by route parameters defined on `router` routes.
+Param callback functions are local to the router on which they are defined. They are not inherited by mounted apps or routers, nor are they triggered for route parameters inherited from parent routers. Hence, param callbacks defined on `router` will be triggered only by route parameters defined on `router` routes.
 
 A param callback will be called only once in a request-response cycle, even if the parameter is matched in multiple routes, as shown in the following examples.