diff --git a/apps/comments/l10n/en_US.js b/apps/comments/l10n/en_US.js
new file mode 100644
index 000000000000..c1aa4258f2ac
--- /dev/null
+++ b/apps/comments/l10n/en_US.js
@@ -0,0 +1,7 @@
+OC.L10N.register(
+    "comments",
+    {
+    "Cancel" : "Cancel",
+    "Save" : "Save"
+},
+"nplurals=2; plural=(n != 1);");
diff --git a/apps/comments/l10n/en_US.json b/apps/comments/l10n/en_US.json
new file mode 100644
index 000000000000..62294c8f2fbb
--- /dev/null
+++ b/apps/comments/l10n/en_US.json
@@ -0,0 +1,5 @@
+{ "translations": {
+    "Cancel" : "Cancel",
+    "Save" : "Save"
+},"pluralForm" :"nplurals=2; plural=(n != 1);"
+}
\ No newline at end of file
diff --git a/apps/dav/l10n/en_US.js b/apps/dav/l10n/en_US.js
new file mode 100644
index 000000000000..95694b662b77
--- /dev/null
+++ b/apps/dav/l10n/en_US.js
@@ -0,0 +1,6 @@
+OC.L10N.register(
+    "dav",
+    {
+    "Personal" : "Personal"
+},
+"nplurals=2; plural=(n != 1);");
diff --git a/apps/dav/l10n/en_US.json b/apps/dav/l10n/en_US.json
new file mode 100644
index 000000000000..fc60c943af1e
--- /dev/null
+++ b/apps/dav/l10n/en_US.json
@@ -0,0 +1,4 @@
+{ "translations": {
+    "Personal" : "Personal"
+},"pluralForm" :"nplurals=2; plural=(n != 1);"
+}
\ No newline at end of file
diff --git a/apps/files/l10n/en_US.js b/apps/files/l10n/en_US.js
new file mode 100644
index 000000000000..fa6148500dc2
--- /dev/null
+++ b/apps/files/l10n/en_US.js
@@ -0,0 +1,23 @@
+OC.L10N.register(
+    "files",
+    {
+    "Unknown error" : "Unknown error",
+    "All files" : "All files",
+    "Close" : "Close",
+    "Download" : "Download",
+    "Rename" : "Rename",
+    "Files" : "Files",
+    "Details" : "Details",
+    "Pending" : "Pending",
+    "Name" : "Name",
+    "Size" : "Size",
+    "New folder" : "New folder",
+    "Cancel" : "Cancel",
+    "Upload" : "Upload",
+    "Settings" : "Settings",
+    "Show hidden files" : "Show hidden files",
+    "No files in here" : "No files in here",
+    "Upload some content or sync with your devices!" : "Upload some content or sync with your devices!",
+    "Select all" : "Select all"
+},
+"nplurals=2; plural=(n != 1);");
diff --git a/apps/files/l10n/en_US.json b/apps/files/l10n/en_US.json
new file mode 100644
index 000000000000..0e99843769c7
--- /dev/null
+++ b/apps/files/l10n/en_US.json
@@ -0,0 +1,21 @@
+{ "translations": {
+    "Unknown error" : "Unknown error",
+    "All files" : "All files",
+    "Close" : "Close",
+    "Download" : "Download",
+    "Rename" : "Rename",
+    "Files" : "Files",
+    "Details" : "Details",
+    "Pending" : "Pending",
+    "Name" : "Name",
+    "Size" : "Size",
+    "New folder" : "New folder",
+    "Cancel" : "Cancel",
+    "Upload" : "Upload",
+    "Settings" : "Settings",
+    "Show hidden files" : "Show hidden files",
+    "No files in here" : "No files in here",
+    "Upload some content or sync with your devices!" : "Upload some content or sync with your devices!",
+    "Select all" : "Select all"
+},"pluralForm" :"nplurals=2; plural=(n != 1);"
+}
\ No newline at end of file
diff --git a/apps/files_external/l10n/en_US.js b/apps/files_external/l10n/en_US.js
new file mode 100644
index 000000000000..4b62237e7668
--- /dev/null
+++ b/apps/files_external/l10n/en_US.js
@@ -0,0 +1,14 @@
+OC.L10N.register(
+    "files_external",
+    {
+    "Personal" : "Personal",
+    "Username" : "Username",
+    "Password" : "Password",
+    "Save" : "Save",
+    "URL" : "URL",
+    "Share" : "Share",
+    "Name" : "Name",
+    "Never" : "Never",
+    "Folder name" : "Folder name"
+},
+"nplurals=2; plural=(n != 1);");
diff --git a/apps/files_external/l10n/en_US.json b/apps/files_external/l10n/en_US.json
new file mode 100644
index 000000000000..a67ebd8c0e28
--- /dev/null
+++ b/apps/files_external/l10n/en_US.json
@@ -0,0 +1,12 @@
+{ "translations": {
+    "Personal" : "Personal",
+    "Username" : "Username",
+    "Password" : "Password",
+    "Save" : "Save",
+    "URL" : "URL",
+    "Share" : "Share",
+    "Name" : "Name",
+    "Never" : "Never",
+    "Folder name" : "Folder name"
+},"pluralForm" :"nplurals=2; plural=(n != 1);"
+}
\ No newline at end of file
diff --git a/apps/files_sharing/l10n/en_US.js b/apps/files_sharing/l10n/en_US.js
new file mode 100644
index 000000000000..d308ec3233c4
--- /dev/null
+++ b/apps/files_sharing/l10n/en_US.js
@@ -0,0 +1,15 @@
+OC.L10N.register(
+    "files_sharing",
+    {
+    "Shared by link" : "Shared by link",
+    "No shared links" : "No shared links",
+    "Cancel" : "Cancel",
+    "Share" : "Share",
+    "Pending" : "Pending",
+    "Shares" : "Shares",
+    "Password" : "Password",
+    "Proceed" : "Proceed",
+    "Name" : "Name",
+    "Download" : "Download"
+},
+"nplurals=2; plural=(n != 1);");
diff --git a/apps/files_sharing/l10n/en_US.json b/apps/files_sharing/l10n/en_US.json
new file mode 100644
index 000000000000..443c5e6c26fa
--- /dev/null
+++ b/apps/files_sharing/l10n/en_US.json
@@ -0,0 +1,13 @@
+{ "translations": {
+    "Shared by link" : "Shared by link",
+    "No shared links" : "No shared links",
+    "Cancel" : "Cancel",
+    "Share" : "Share",
+    "Pending" : "Pending",
+    "Shares" : "Shares",
+    "Password" : "Password",
+    "Proceed" : "Proceed",
+    "Name" : "Name",
+    "Download" : "Download"
+},"pluralForm" :"nplurals=2; plural=(n != 1);"
+}
\ No newline at end of file
diff --git a/apps/files_trashbin/l10n/en_US.js b/apps/files_trashbin/l10n/en_US.js
new file mode 100644
index 000000000000..54bb357b5b46
--- /dev/null
+++ b/apps/files_trashbin/l10n/en_US.js
@@ -0,0 +1,8 @@
+OC.L10N.register(
+    "files_trashbin",
+    {
+    "Error" : "Error",
+    "Select all" : "Select all",
+    "Name" : "Name"
+},
+"nplurals=2; plural=(n != 1);");
diff --git a/apps/files_trashbin/l10n/en_US.json b/apps/files_trashbin/l10n/en_US.json
new file mode 100644
index 000000000000..501096304ae3
--- /dev/null
+++ b/apps/files_trashbin/l10n/en_US.json
@@ -0,0 +1,6 @@
+{ "translations": {
+    "Error" : "Error",
+    "Select all" : "Select all",
+    "Name" : "Name"
+},"pluralForm" :"nplurals=2; plural=(n != 1);"
+}
\ No newline at end of file
diff --git a/apps/systemtags/l10n/en_US.js b/apps/systemtags/l10n/en_US.js
new file mode 100644
index 000000000000..984ae9db2dff
--- /dev/null
+++ b/apps/systemtags/l10n/en_US.js
@@ -0,0 +1,8 @@
+OC.L10N.register(
+    "systemtags",
+    {
+    "No files in here" : "No files in here",
+    "Name" : "Name",
+    "Size" : "Size"
+},
+"nplurals=2; plural=(n != 1);");
diff --git a/apps/systemtags/l10n/en_US.json b/apps/systemtags/l10n/en_US.json
new file mode 100644
index 000000000000..b212d05b0ab7
--- /dev/null
+++ b/apps/systemtags/l10n/en_US.json
@@ -0,0 +1,6 @@
+{ "translations": {
+    "No files in here" : "No files in here",
+    "Name" : "Name",
+    "Size" : "Size"
+},"pluralForm" :"nplurals=2; plural=(n != 1);"
+}
\ No newline at end of file
diff --git a/core/l10n/en_US.js b/core/l10n/en_US.js
new file mode 100644
index 000000000000..2d6c551b67b1
--- /dev/null
+++ b/core/l10n/en_US.js
@@ -0,0 +1,37 @@
+OC.L10N.register(
+    "core",
+    {
+    "Download / View" : "Download / View",
+    "Settings" : "Settings",
+    "seconds ago" : "seconds ago",
+    "No" : "No",
+    "Yes" : "Yes",
+    "Choose" : "Choose",
+    "Cancel" : "Cancel",
+    "Continue" : "Continue",
+    "Error" : "Error",
+    "Expiration" : "Expiration",
+    "Remove link" : "Remove link",
+    "Link" : "Link",
+    "Remove" : "Remove",
+    "Link name" : "Link name",
+    "Name" : "Name",
+    "Password" : "Password",
+    "Share" : "Share",
+    "Save" : "Save",
+    "can share" : "can share",
+    "can edit" : "can edit",
+    "create" : "create",
+    "change" : "change",
+    "delete" : "delete",
+    "Rename" : "Rename",
+    "Personal" : "Personal",
+    "Help" : "Help",
+    "File not found" : "File not found",
+    "Imprint" : "Imprint",
+    "Username" : "Username",
+    "Menu" : "Menu",
+    "Search" : "Search",
+    "Login" : "Login"
+},
+"nplurals=2; plural=(n != 1);");
diff --git a/core/l10n/en_US.json b/core/l10n/en_US.json
new file mode 100644
index 000000000000..f6eebbcf39f8
--- /dev/null
+++ b/core/l10n/en_US.json
@@ -0,0 +1,35 @@
+{ "translations": {
+    "Download / View" : "Download / View",
+    "Settings" : "Settings",
+    "seconds ago" : "seconds ago",
+    "No" : "No",
+    "Yes" : "Yes",
+    "Choose" : "Choose",
+    "Cancel" : "Cancel",
+    "Continue" : "Continue",
+    "Error" : "Error",
+    "Expiration" : "Expiration",
+    "Remove link" : "Remove link",
+    "Link" : "Link",
+    "Remove" : "Remove",
+    "Link name" : "Link name",
+    "Name" : "Name",
+    "Password" : "Password",
+    "Share" : "Share",
+    "Save" : "Save",
+    "can share" : "can share",
+    "can edit" : "can edit",
+    "create" : "create",
+    "change" : "change",
+    "delete" : "delete",
+    "Rename" : "Rename",
+    "Personal" : "Personal",
+    "Help" : "Help",
+    "File not found" : "File not found",
+    "Imprint" : "Imprint",
+    "Username" : "Username",
+    "Menu" : "Menu",
+    "Search" : "Search",
+    "Login" : "Login"
+},"pluralForm" :"nplurals=2; plural=(n != 1);"
+}
\ No newline at end of file
diff --git a/lib/l10n/en_US.js b/lib/l10n/en_US.js
new file mode 100644
index 000000000000..3fed27014958
--- /dev/null
+++ b/lib/l10n/en_US.js
@@ -0,0 +1,14 @@
+OC.L10N.register(
+    "lib",
+    {
+    "seconds ago" : "seconds ago",
+    "Username" : "Username",
+    "Password" : "Password",
+    "File name contains at least one invalid character" : "File name contains at least one invalid character",
+    "General" : "General",
+    "Security" : "Security",
+    "Search" : "Search",
+    "Settings" : "Settings",
+    "Imprint" : "Imprint"
+},
+"nplurals=2; plural=(n != 1);");
diff --git a/lib/l10n/en_US.json b/lib/l10n/en_US.json
new file mode 100644
index 000000000000..d885519a30d7
--- /dev/null
+++ b/lib/l10n/en_US.json
@@ -0,0 +1,12 @@
+{ "translations": {
+    "seconds ago" : "seconds ago",
+    "Username" : "Username",
+    "Password" : "Password",
+    "File name contains at least one invalid character" : "File name contains at least one invalid character",
+    "General" : "General",
+    "Security" : "Security",
+    "Search" : "Search",
+    "Settings" : "Settings",
+    "Imprint" : "Imprint"
+},"pluralForm" :"nplurals=2; plural=(n != 1);"
+}
\ No newline at end of file
diff --git a/lib/l10n/ug.js b/lib/l10n/ug.js
index c4df43d39448..afd478a19bf6 100644
--- a/lib/l10n/ug.js
+++ b/lib/l10n/ug.js
@@ -9,6 +9,7 @@ OC.L10N.register(
     "None" : "يوق",
     "Username" : "ئىشلەتكۈچى ئاتى",
     "Password" : "ئىم",
+    "File name contains at least one invalid character" : "File name contains at least one invalid character",
     "__language_name__" : "ئۇيغۇرچە",
     "Apps" : "ئەپلەر",
     "General" : "ئادەتتىكى",
diff --git a/lib/l10n/ug.json b/lib/l10n/ug.json
index 6d8f879bfa4c..fe58ff1bdb2a 100644
--- a/lib/l10n/ug.json
+++ b/lib/l10n/ug.json
@@ -7,6 +7,7 @@
     "None" : "يوق",
     "Username" : "ئىشلەتكۈچى ئاتى",
     "Password" : "ئىم",
+    "File name contains at least one invalid character" : "File name contains at least one invalid character",
     "__language_name__" : "ئۇيغۇرچە",
     "Apps" : "ئەپلەر",
     "General" : "ئادەتتىكى",
diff --git a/settings/l10n/en_US.js b/settings/l10n/en_US.js
new file mode 100644
index 000000000000..65fd0b8a40af
--- /dev/null
+++ b/settings/l10n/en_US.js
@@ -0,0 +1,17 @@
+OC.L10N.register(
+    "settings",
+    {
+    "Share" : "Share",
+    "unknown" : "unknown",
+    "Save" : "Save",
+    "Login" : "Login",
+    "Server address" : "Server address",
+    "Cancel" : "Cancel",
+    "Username" : "Username",
+    "Password" : "Password",
+    "Change password" : "Change password",
+    "Name" : "Name",
+    "Personal" : "Personal",
+    "Settings" : "Settings"
+},
+"nplurals=2; plural=(n != 1);");
diff --git a/settings/l10n/en_US.json b/settings/l10n/en_US.json
new file mode 100644
index 000000000000..d74e34196098
--- /dev/null
+++ b/settings/l10n/en_US.json
@@ -0,0 +1,15 @@
+{ "translations": {
+    "Share" : "Share",
+    "unknown" : "unknown",
+    "Save" : "Save",
+    "Login" : "Login",
+    "Server address" : "Server address",
+    "Cancel" : "Cancel",
+    "Username" : "Username",
+    "Password" : "Password",
+    "Change password" : "Change password",
+    "Name" : "Name",
+    "Personal" : "Personal",
+    "Settings" : "Settings"
+},"pluralForm" :"nplurals=2; plural=(n != 1);"
+}
\ No newline at end of file
diff --git a/tests/data/apptheme/apps/files/l10n/en_US.js b/tests/data/apptheme/apps/files/l10n/en_US.js
new file mode 100644
index 000000000000..fa6148500dc2
--- /dev/null
+++ b/tests/data/apptheme/apps/files/l10n/en_US.js
@@ -0,0 +1,23 @@
+OC.L10N.register(
+    "files",
+    {
+    "Unknown error" : "Unknown error",
+    "All files" : "All files",
+    "Close" : "Close",
+    "Download" : "Download",
+    "Rename" : "Rename",
+    "Files" : "Files",
+    "Details" : "Details",
+    "Pending" : "Pending",
+    "Name" : "Name",
+    "Size" : "Size",
+    "New folder" : "New folder",
+    "Cancel" : "Cancel",
+    "Upload" : "Upload",
+    "Settings" : "Settings",
+    "Show hidden files" : "Show hidden files",
+    "No files in here" : "No files in here",
+    "Upload some content or sync with your devices!" : "Upload some content or sync with your devices!",
+    "Select all" : "Select all"
+},
+"nplurals=2; plural=(n != 1);");
diff --git a/tests/data/apptheme/apps/files/l10n/en_US.json b/tests/data/apptheme/apps/files/l10n/en_US.json
new file mode 100644
index 000000000000..0e99843769c7
--- /dev/null
+++ b/tests/data/apptheme/apps/files/l10n/en_US.json
@@ -0,0 +1,21 @@
+{ "translations": {
+    "Unknown error" : "Unknown error",
+    "All files" : "All files",
+    "Close" : "Close",
+    "Download" : "Download",
+    "Rename" : "Rename",
+    "Files" : "Files",
+    "Details" : "Details",
+    "Pending" : "Pending",
+    "Name" : "Name",
+    "Size" : "Size",
+    "New folder" : "New folder",
+    "Cancel" : "Cancel",
+    "Upload" : "Upload",
+    "Settings" : "Settings",
+    "Show hidden files" : "Show hidden files",
+    "No files in here" : "No files in here",
+    "Upload some content or sync with your devices!" : "Upload some content or sync with your devices!",
+    "Select all" : "Select all"
+},"pluralForm" :"nplurals=2; plural=(n != 1);"
+}
\ No newline at end of file
diff --git a/tests/data/themes/abc/apps/files/l10n/en_US.js b/tests/data/themes/abc/apps/files/l10n/en_US.js
new file mode 100644
index 000000000000..fa6148500dc2
--- /dev/null
+++ b/tests/data/themes/abc/apps/files/l10n/en_US.js
@@ -0,0 +1,23 @@
+OC.L10N.register(
+    "files",
+    {
+    "Unknown error" : "Unknown error",
+    "All files" : "All files",
+    "Close" : "Close",
+    "Download" : "Download",
+    "Rename" : "Rename",
+    "Files" : "Files",
+    "Details" : "Details",
+    "Pending" : "Pending",
+    "Name" : "Name",
+    "Size" : "Size",
+    "New folder" : "New folder",
+    "Cancel" : "Cancel",
+    "Upload" : "Upload",
+    "Settings" : "Settings",
+    "Show hidden files" : "Show hidden files",
+    "No files in here" : "No files in here",
+    "Upload some content or sync with your devices!" : "Upload some content or sync with your devices!",
+    "Select all" : "Select all"
+},
+"nplurals=2; plural=(n != 1);");
diff --git a/tests/data/themes/abc/apps/files/l10n/en_US.json b/tests/data/themes/abc/apps/files/l10n/en_US.json
new file mode 100644
index 000000000000..0e99843769c7
--- /dev/null
+++ b/tests/data/themes/abc/apps/files/l10n/en_US.json
@@ -0,0 +1,21 @@
+{ "translations": {
+    "Unknown error" : "Unknown error",
+    "All files" : "All files",
+    "Close" : "Close",
+    "Download" : "Download",
+    "Rename" : "Rename",
+    "Files" : "Files",
+    "Details" : "Details",
+    "Pending" : "Pending",
+    "Name" : "Name",
+    "Size" : "Size",
+    "New folder" : "New folder",
+    "Cancel" : "Cancel",
+    "Upload" : "Upload",
+    "Settings" : "Settings",
+    "Show hidden files" : "Show hidden files",
+    "No files in here" : "No files in here",
+    "Upload some content or sync with your devices!" : "Upload some content or sync with your devices!",
+    "Select all" : "Select all"
+},"pluralForm" :"nplurals=2; plural=(n != 1);"
+}
\ No newline at end of file