diff --git a/books/free-programming-books-fa_IR.md b/books/free-programming-books-fa_IR.md
index 51722df1a..7afd80f68 100644
--- a/books/free-programming-books-fa_IR.md
+++ b/books/free-programming-books-fa_IR.md
@@ -1,4 +1,4 @@
-### Index
+### فهرست
 
 * [رایانش ابری](#%D8%B1%D8%A7%DB%8C%D8%A7%D9%86%D8%B4-%D8%A7%D8%A8%D8%B1%DB%8C)
 * [مهندسی نرم‌افزار](#%D9%85%D9%87%D9%86%D8%AF%D8%B3%DB%8C-%D9%86%D8%B1%D9%85%E2%80%8C%D8%A7%D9%81%D8%B2%D8%A7%D8%B1)
diff --git a/books/free-programming-books-pt_BR.md b/books/free-programming-books-pt_BR.md
index 7d8fc86ae..8831259fb 100644
--- a/books/free-programming-books-pt_BR.md
+++ b/books/free-programming-books-pt_BR.md
@@ -1,4 +1,4 @@
-### Index
+### Índice
 
 * [Agnósticos](#agnósticos)
     * [IDE / Editores](#ide--editores)
diff --git a/books/free-programming-books-pt_PT.md b/books/free-programming-books-pt_PT.md
index fe88e1597..c63051bec 100644
--- a/books/free-programming-books-pt_PT.md
+++ b/books/free-programming-books-pt_PT.md
@@ -1,4 +1,4 @@
-### Index
+### Indice
 
 * [C/C++](#cc)
 * [Haskell](#haskell)
diff --git a/books/free-programming-books-tr.md b/books/free-programming-books-tr.md
index c1ce08126..a2691c403 100644
--- a/books/free-programming-books-tr.md
+++ b/books/free-programming-books-tr.md
@@ -1,4 +1,4 @@
-### Index
+### İçindekiler
 
 * [Algoritma ve Veri Yapıları](#algoritma-ve-veri-yapilari)
 * [Android](#android)
diff --git a/books/free-programming-books-zh.md b/books/free-programming-books-zh.md
index f83be762d..a760d3b19 100644
--- a/books/free-programming-books-zh.md
+++ b/books/free-programming-books-zh.md
@@ -1,4 +1,4 @@
-## Index
+## 目录
 
 * [语言无关](#语言无关)
     * [版本控制](#版本控制)
diff --git a/courses/free-courses-es.md b/courses/free-courses-es.md
index 1e32082c7..d3f01d3ce 100644
--- a/courses/free-courses-es.md
+++ b/courses/free-courses-es.md
@@ -1,4 +1,4 @@
-### Index
+### Índice
 
 * [Android](#android)
 * [Arduino](#arduino)
diff --git a/courses/free-courses-it.md b/courses/free-courses-it.md
index 60fc291d4..76c2f7372 100644
--- a/courses/free-courses-it.md
+++ b/courses/free-courses-it.md
@@ -1,4 +1,4 @@
-### Index
+### Indice
 
 * [Algoritmi e Strutture Dati](#algoritmi-e-strutture-dati)
 * [Android](#android)
diff --git a/courses/free-courses-km.md b/courses/free-courses-km.md
index 54e4f97a9..f58200f0e 100644
--- a/courses/free-courses-km.md
+++ b/courses/free-courses-km.md
@@ -1,4 +1,4 @@
-### Index
+### មាតិកា
 
 * [Computer Science](#computer-science)
 * [Flutter](#flutter)
diff --git a/courses/free-courses-pt_PT.md b/courses/free-courses-pt_PT.md
index 6c2c74ac7..fbbab78e8 100644
--- a/courses/free-courses-pt_PT.md
+++ b/courses/free-courses-pt_PT.md
@@ -1,4 +1,4 @@
-### Index
+### Índice
 
 * [Arduino](#arduino)
 * [Raspberry Pi](#raspberry-pi)
@@ -12,3 +12,4 @@
 ### Raspberry Pi
 
 * [Curso Raspberry Pi](https://www.electrofun.pt/blog/curso-raspberry-pi-1-introducao-indice/)
+
diff --git a/courses/free-courses-ru.md b/courses/free-courses-ru.md
index da9f35ac2..76c596733 100644
--- a/courses/free-courses-ru.md
+++ b/courses/free-courses-ru.md
@@ -1,4 +1,4 @@
-### Index
+### Cодержание
 
 * [Дизайн и Aрхитектура](#design-architecture)
 * [C++](#cpp)
diff --git a/more/free-programming-interactive-tutorials-pt_BR.md b/more/free-programming-interactive-tutorials-pt_BR.md
index 3addc6bd6..196d8e79e 100644
--- a/more/free-programming-interactive-tutorials-pt_BR.md
+++ b/more/free-programming-interactive-tutorials-pt_BR.md
@@ -1,4 +1,4 @@
-### Index
+### Índice
 
 * [Python](#python)