10 files changed, 22 insertions, 12 deletions
diff --git a/files/es/learn/javascript/building_blocks/construyendo_tu_propia_funcion/index.html b/files/es/learn/javascript/building_blocks/build_your_own_function/index.html
index 5f9bcc7c8b..052ddb8b78 100644
--- a/files/es/learn/javascript/building_blocks/construyendo_tu_propia_funcion/index.html
+++ b/files/es/learn/javascript/building_blocks/build_your_own_function/index.html
@@ -1,6 +1,6 @@
 ---
 title: Construye tu propia función
-slug: Learn/JavaScript/Building_blocks/Construyendo_tu_propia_funcion
+slug: Learn/JavaScript/Building_blocks/Build_your_own_function
 tags:
   - Aprender
   - Artículo
@@ -11,6 +11,7 @@ tags:
   - Principiante
   - Tutorial
 translation_of: Learn/JavaScript/Building_blocks/Build_your_own_function
+original_slug: Learn/JavaScript/Building_blocks/Construyendo_tu_propia_funcion
 ---
 <div>{{LearnSidebar}}</div>
 
diff --git a/files/es/learn/javascript/building_blocks/eventos/index.html b/files/es/learn/javascript/building_blocks/events/index.html
index 7bdb81768a..5fc7ee8df5 100644
--- a/files/es/learn/javascript/building_blocks/eventos/index.html
+++ b/files/es/learn/javascript/building_blocks/events/index.html
@@ -1,7 +1,8 @@
 ---
 title: Introducción a eventos
-slug: Learn/JavaScript/Building_blocks/Eventos
+slug: Learn/JavaScript/Building_blocks/Events
 translation_of: Learn/JavaScript/Building_blocks/Events
+original_slug: Learn/JavaScript/Building_blocks/Eventos
 ---
 <div>{{LearnSidebar}}</div>
 
diff --git a/files/es/learn/javascript/building_blocks/galeria_de_imagenes/index.html b/files/es/learn/javascript/building_blocks/image_gallery/index.html
index 205f1a11aa..a4bad1842e 100644
--- a/files/es/learn/javascript/building_blocks/galeria_de_imagenes/index.html
+++ b/files/es/learn/javascript/building_blocks/image_gallery/index.html
@@ -1,7 +1,8 @@
 ---
 title: Galería de imágenes
-slug: Learn/JavaScript/Building_blocks/Galeria_de_imagenes
+slug: Learn/JavaScript/Building_blocks/Image_gallery
 translation_of: Learn/JavaScript/Building_blocks/Image_gallery
+original_slug: Learn/JavaScript/Building_blocks/Galeria_de_imagenes
 ---
 <div>{{LearnSidebar}}</div>
 
diff --git a/files/es/learn/javascript/building_blocks/bucle_codigo/index.html b/files/es/learn/javascript/building_blocks/looping_code/index.html
index e26509afc5..c1386a16ed 100644
--- a/files/es/learn/javascript/building_blocks/bucle_codigo/index.html
+++ b/files/es/learn/javascript/building_blocks/looping_code/index.html
@@ -1,7 +1,8 @@
 ---
 title: Bucles
-slug: Learn/JavaScript/Building_blocks/Bucle_codigo
+slug: Learn/JavaScript/Building_blocks/Looping_code
 translation_of: Learn/JavaScript/Building_blocks/Looping_code
+original_slug: Learn/JavaScript/Building_blocks/Bucle_codigo
 ---
 <div>{{LearnSidebar}}</div>
 
diff --git a/files/es/learn/javascript/client-side_web_apis/introducción/index.html b/files/es/learn/javascript/client-side_web_apis/introduction/index.html
index fc73d4ebc9..931a5d1328 100644
--- a/files/es/learn/javascript/client-side_web_apis/introducción/index.html
+++ b/files/es/learn/javascript/client-side_web_apis/introduction/index.html
@@ -1,7 +1,8 @@
 ---
 title: Introducción a las APIs web
-slug: Learn/JavaScript/Client-side_web_APIs/Introducción
+slug: Learn/JavaScript/Client-side_web_APIs/Introduction
 translation_of: Learn/JavaScript/Client-side_web_APIs/Introduction
+original_slug: Learn/JavaScript/Client-side_web_APIs/Introducción
 ---
 <div>{{LearnSidebar}}</div>
 
diff --git a/files/es/learn/javascript/first_steps/matemáticas/index.html b/files/es/learn/javascript/first_steps/math/index.html
index d9117ed211..9533ac05d8 100644
--- a/files/es/learn/javascript/first_steps/matemáticas/index.html
+++ b/files/es/learn/javascript/first_steps/math/index.html
@@ -1,6 +1,6 @@
 ---
 title: Matemáticas básicas en JavaScript — números y operadores
-slug: Learn/JavaScript/First_steps/Matemáticas
+slug: Learn/JavaScript/First_steps/Math
 tags:
   - Aprender
   - Artículo
@@ -12,9 +12,10 @@ tags:
   - Operadores
   - Principiante
   - incremento
-  - 'l10n:priority'
+  - l10n:priority
   - modulo
 translation_of: Learn/JavaScript/First_steps/Math
+original_slug: Learn/JavaScript/First_steps/Matemáticas
 ---
 <div>{{LearnSidebar}}</div>
 
diff --git a/files/es/learn/javascript/first_steps/generador_de_historias_absurdas/index.html b/files/es/learn/javascript/first_steps/silly_story_generator/index.html
index 58bb8e688a..c3b7d16dfe 100644
--- a/files/es/learn/javascript/first_steps/generador_de_historias_absurdas/index.html
+++ b/files/es/learn/javascript/first_steps/silly_story_generator/index.html
@@ -1,6 +1,6 @@
 ---
 title: Generador de historias absurdas
-slug: Learn/JavaScript/First_steps/Generador_de_historias_absurdas
+slug: Learn/JavaScript/First_steps/Silly_story_generator
 tags:
   - Arreglos
   - Cadenas
@@ -8,6 +8,7 @@ tags:
   - Numeros
   - Principiante
 translation_of: Learn/JavaScript/First_steps/Silly_story_generator
+original_slug: Learn/JavaScript/First_steps/Generador_de_historias_absurdas
 ---
 <div>{{LearnSidebar}}</div>
 
diff --git a/files/es/learn/javascript/first_steps/prueba_tus_habilidades_colon__strings/index.html b/files/es/learn/javascript/first_steps/test_your_skills_colon__strings/index.html
index f919ac1ee3..05bd91d296 100644
--- a/files/es/learn/javascript/first_steps/prueba_tus_habilidades_colon__strings/index.html
+++ b/files/es/learn/javascript/first_steps/test_your_skills_colon__strings/index.html
@@ -1,6 +1,6 @@
 ---
 title: 'Prueba tus habilidades: Strings'
-slug: 'Learn/JavaScript/First_steps/Prueba_tus_habilidades:_Strings'
+slug: Learn/JavaScript/First_steps/Test_your_skills:_Strings
 tags:
   - Cadenas
   - JavaScript
@@ -9,7 +9,8 @@ tags:
   - Prueba tus habilidades
   - aprende
   - strings
-translation_of: 'Learn/JavaScript/First_steps/Test_your_skills:_Strings'
+translation_of: Learn/JavaScript/First_steps/Test_your_skills:_Strings
+original_slug: Learn/JavaScript/First_steps/Prueba_tus_habilidades:_Strings
 ---
 <div>{{learnsidebar}}</div>
 
diff --git a/files/es/learn/javascript/first_steps/qué_es_javascript/index.html b/files/es/learn/javascript/first_steps/what_is_javascript/index.html
index bd845c8681..f26d6116ea 100644
--- a/files/es/learn/javascript/first_steps/qué_es_javascript/index.html
+++ b/files/es/learn/javascript/first_steps/what_is_javascript/index.html
@@ -1,6 +1,6 @@
 ---
 title: ¿Qué es JavaScript?
-slug: Learn/JavaScript/First_steps/Qué_es_JavaScript
+slug: Learn/JavaScript/First_steps/What_is_JavaScript
 tags:
   - APIs
   - Aprender
@@ -17,6 +17,7 @@ tags:
   - comentários
   - externo
 translation_of: Learn/JavaScript/First_steps/What_is_JavaScript
+original_slug: Learn/JavaScript/First_steps/Qué_es_JavaScript
 ---
 <div>{{LearnSidebar}}</div>
 
diff --git a/files/es/learn/javascript/objects/ejercicio_práctico_de_construcción_de_objetos/index.html b/files/es/learn/javascript/objects/object_building_practice/index.html
index 6dfaaf0d08..6814a34289 100644
--- a/files/es/learn/javascript/objects/ejercicio_práctico_de_construcción_de_objetos/index.html
+++ b/files/es/learn/javascript/objects/object_building_practice/index.html
@@ -1,7 +1,8 @@
 ---
 title: Ejercicio práctico de construcción de objetos
-slug: Learn/JavaScript/Objects/Ejercicio_práctico_de_construcción_de_objetos
+slug: Learn/JavaScript/Objects/Object_building_practice
 translation_of: Learn/JavaScript/Objects/Object_building_practice
+original_slug: Learn/JavaScript/Objects/Ejercicio_práctico_de_construcción_de_objetos
 ---
 <div>{{LearnSidebar}}</div>