diff --git a/app/assets/javascripts/locales/cs.js.erb b/app/assets/javascripts/locales/cs.js.erb
index 36dfbb499d..6e65843d35 100644
--- a/app/assets/javascripts/locales/cs.js.erb
+++ b/app/assets/javascripts/locales/cs.js.erb
@@ -1,3 +1,4 @@
+<%# encoding: utf-8 %>
 //= depend_on 'client.cs.yml'
 //= require locales/i18n
 <%= JsLocaleHelper.output_locale(:cs) %>
diff --git a/app/assets/javascripts/locales/de.js.erb b/app/assets/javascripts/locales/de.js.erb
index c82f281649..65ed112d81 100644
--- a/app/assets/javascripts/locales/de.js.erb
+++ b/app/assets/javascripts/locales/de.js.erb
@@ -1,3 +1,4 @@
+<%# encoding: utf-8 %>
 //= depend_on 'client.de.yml'
 //= require locales/i18n
 <%= JsLocaleHelper.output_locale(:de) %>
diff --git a/app/assets/javascripts/locales/en.js.erb b/app/assets/javascripts/locales/en.js.erb
index df19d22fa8..52dc206265 100644
--- a/app/assets/javascripts/locales/en.js.erb
+++ b/app/assets/javascripts/locales/en.js.erb
@@ -1,3 +1,4 @@
+<%# encoding: utf-8 %>
 //= depend_on 'client.en.yml'
 //= require locales/i18n
 <%= JsLocaleHelper.output_locale(:en) %>
diff --git a/app/assets/javascripts/locales/fr.js.erb b/app/assets/javascripts/locales/fr.js.erb
index 67b11dd389..3bf35318c4 100644
--- a/app/assets/javascripts/locales/fr.js.erb
+++ b/app/assets/javascripts/locales/fr.js.erb
@@ -1,3 +1,4 @@
+<%# encoding: utf-8 %>
 //= depend_on 'client.fr.yml'
 //= require locales/i18n
 <%= JsLocaleHelper.output_locale(:fr) %>
diff --git a/app/assets/javascripts/locales/nl.js.erb b/app/assets/javascripts/locales/nl.js.erb
index 3016458bfa..2a4528c5dd 100644
--- a/app/assets/javascripts/locales/nl.js.erb
+++ b/app/assets/javascripts/locales/nl.js.erb
@@ -1,3 +1,4 @@
+<%# encoding: utf-8 %>
 //= depend_on 'client.nl.yml'
 //= require locales/i18n
 <%= JsLocaleHelper.output_locale(:nl) %>
diff --git a/app/assets/javascripts/locales/pseudo.js.erb b/app/assets/javascripts/locales/pseudo.js.erb
index 5defc79963..6f5fbb5fbc 100644
--- a/app/assets/javascripts/locales/pseudo.js.erb
+++ b/app/assets/javascripts/locales/pseudo.js.erb
@@ -1,3 +1,4 @@
+<%# encoding: utf-8 %>
 //= depend_on 'client.pseudo.yml'
 //= require locales/i18n
 <%= JsLocaleHelper.output_locale(:pseudo) %>
diff --git a/app/assets/javascripts/locales/sv.js.erb b/app/assets/javascripts/locales/sv.js.erb
index e404277bc6..e2ea79b958 100644
--- a/app/assets/javascripts/locales/sv.js.erb
+++ b/app/assets/javascripts/locales/sv.js.erb
@@ -1,3 +1,4 @@
+<%# encoding: utf-8 %>
 //= depend_on 'client.sv.yml'
 //= require locales/i18n
 <%= JsLocaleHelper.output_locale(:sv) %>
diff --git a/app/assets/javascripts/locales/zh_CN.js.erb b/app/assets/javascripts/locales/zh_CN.js.erb
index ac663d89b4..23f75014f2 100644
--- a/app/assets/javascripts/locales/zh_CN.js.erb
+++ b/app/assets/javascripts/locales/zh_CN.js.erb
@@ -1,3 +1,4 @@
+<%# encoding: utf-8 %>
 //= depend_on 'client.zh_CN.yml'
 //= require locales/i18n
 <%= JsLocaleHelper.output_locale(:zh_CN) %>
diff --git a/app/assets/javascripts/locales/zh_TW.js.erb b/app/assets/javascripts/locales/zh_TW.js.erb
index da6a15c303..dbe87fa1ce 100644
--- a/app/assets/javascripts/locales/zh_TW.js.erb
+++ b/app/assets/javascripts/locales/zh_TW.js.erb
@@ -1,3 +1,4 @@
+<%# encoding: utf-8 %>
 //= depend_on 'client.zh_TW.yml'
 //= require locales/i18n
 <%= JsLocaleHelper.output_locale(:zh_TW) %>