diff --git a/mail/app/profile/thunderbird.js b/mail/app/profile/thunderbird.js
index 1c4696152568..b34bcfe8fd09 100644
--- a/mail/app/profile/thunderbird.js
+++ b/mail/app/profile/thunderbird.js
@@ -74,6 +74,26 @@ pref("addressbook.throbber.url","chrome://messenger-region/locale/region.propert
 /////////////////////////////////////////////////////////////////
 // Overrides for generic app behavior from the seamonkey suite's all.js
 /////////////////////////////////////////////////////////////////
+
+// l12n and i18n
+pref("general.useragent.locale", "chrome://global/locale/intl.properties");
+pref("intl.charsetmenu.mailedit", "chrome://global/locale/intl.properties");
+pref("intl.accept_languages", "chrome://global/locale/intl.properties");
+// collationOption is only set on linux for japanese. see bug 18338 and 62015
+// we need to check if this pref is still useful.
+pref("intl.collationOption",  "chrome://global-platform/locale/intl.properties");
+pref("intl.charsetmenu.browser.static", "chrome://global/locale/intl.properties");
+pref("intl.charsetmenu.browser.more1",  "chrome://global/locale/intl.properties");
+pref("intl.charsetmenu.browser.more2",  "chrome://global/locale/intl.properties");
+pref("intl.charsetmenu.browser.more3",  "chrome://global/locale/intl.properties");
+pref("intl.charsetmenu.browser.more4",  "chrome://global/locale/intl.properties");
+pref("intl.charsetmenu.browser.more5",  "chrome://global/locale/intl.properties");
+pref("intl.charsetmenu.browser.unicode",  "chrome://global/locale/intl.properties");
+pref("intl.charset.detector", "chrome://global/locale/intl.properties");
+pref("intl.charset.default",  "chrome://global-platform/locale/intl.properties");
+pref("font.language.group", "chrome://global/locale/intl.properties");
+pref("intl.menuitems.alwaysappendaccesskeys","chrome://global/locale/intl.properties");
+
 pref("signon.rememberSignons",              true);
 pref("signon.expireMasterPassword",         false);