diff --git a/client/i18n/locales/english/intro.json b/client/i18n/locales/english/intro.json
index c0c037f66f..305912d23f 100644
--- a/client/i18n/locales/english/intro.json
+++ b/client/i18n/locales/english/intro.json
@@ -182,7 +182,7 @@
       "bootstrap": {
         "title": "Bootstrap",
         "intro": [
-          "Bootstrap is a front end framework used to design responsive web pages and applications. It takes a mobile-fist approach to web development, and includes pre-built CSS styles and classes, plus some JavaScript functionality.",
+          "Bootstrap is a front end framework used to design responsive web pages and applications. It takes a mobile-first approach to web development, and includes pre-built CSS styles and classes, plus some JavaScript functionality.",
           "In this course, you'll learn how to build responsive websites with Bootstrap, and use its included classes to style buttons, images, forms, navigation, and other common elements."
         ]
       },
diff --git a/client/i18n/locales/espanol/intro.json b/client/i18n/locales/espanol/intro.json
index 75580dbaa3..1581dffa7b 100644
--- a/client/i18n/locales/espanol/intro.json
+++ b/client/i18n/locales/espanol/intro.json
@@ -200,7 +200,7 @@
       "bootstrap": {
         "title": "Bootstrap",
         "intro": [
-          "Bootstrap is a front end framework used to design responsive web pages and applications. It takes a mobile-fist approach to web development, and includes pre-built CSS styles and classes, plus some JavaScript functionality.",
+          "Bootstrap is a front end framework used to design responsive web pages and applications. It takes a mobile-first approach to web development, and includes pre-built CSS styles and classes, plus some JavaScript functionality.",
           "In this course, you'll learn how to build responsive websites with Bootstrap, and use its included classes to style buttons, images, forms, navigation, and other common elements."
         ]
       },