diff --git a/assets/html/cs/tethering_help.html b/assets/html/cs/tethering_help.html
index 7b3165f3e06..92ffb5a6127 100644
--- a/assets/html/cs/tethering_help.html
+++ b/assets/html/cs/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/cs/tethering_usb_help.html b/assets/html/cs/tethering_usb_help.html
index 85631f69373..425431f92d3 100644
--- a/assets/html/cs/tethering_usb_help.html
+++ b/assets/html/cs/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/cs/tethering_wifi_help.html b/assets/html/cs/tethering_wifi_help.html
index 73f966124e5..630438cf00f 100644
--- a/assets/html/cs/tethering_wifi_help.html
+++ b/assets/html/cs/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/da/tethering_help.html b/assets/html/da/tethering_help.html
index 30363e71d57..3b2a55399ea 100644
--- a/assets/html/da/tethering_help.html
+++ b/assets/html/da/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/da/tethering_usb_help.html b/assets/html/da/tethering_usb_help.html
index be60902aef0..f9f7fc1cb08 100644
--- a/assets/html/da/tethering_usb_help.html
+++ b/assets/html/da/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/da/tethering_wifi_help.html b/assets/html/da/tethering_wifi_help.html
index bdab832235a..8c5063b19ef 100644
--- a/assets/html/da/tethering_wifi_help.html
+++ b/assets/html/da/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/de/tethering_help.html b/assets/html/de/tethering_help.html
index 0a060d52a2e..317e176a066 100644
--- a/assets/html/de/tethering_help.html
+++ b/assets/html/de/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/de/tethering_usb_help.html b/assets/html/de/tethering_usb_help.html
index 7a2927ea700..8bad77d29aa 100644
--- a/assets/html/de/tethering_usb_help.html
+++ b/assets/html/de/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/de/tethering_wifi_help.html b/assets/html/de/tethering_wifi_help.html
index 89e668d7f51..a7087662645 100644
--- a/assets/html/de/tethering_wifi_help.html
+++ b/assets/html/de/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/el/tethering_help.html b/assets/html/el/tethering_help.html
index d5aefec2ae2..eae22eb509f 100644
--- a/assets/html/el/tethering_help.html
+++ b/assets/html/el/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/el/tethering_usb_help.html b/assets/html/el/tethering_usb_help.html
index cbc3af61134..96ea2c8fdff 100644
--- a/assets/html/el/tethering_usb_help.html
+++ b/assets/html/el/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/el/tethering_wifi_help.html b/assets/html/el/tethering_wifi_help.html
index 530a1855128..85077486b9d 100644
--- a/assets/html/el/tethering_wifi_help.html
+++ b/assets/html/el/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/en_gb/tethering_help.html b/assets/html/en_gb/tethering_help.html
index 8d0bf77c78b..63fec31e2d3 100644
--- a/assets/html/en_gb/tethering_help.html
+++ b/assets/html/en_gb/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/en_gb/tethering_usb_help.html b/assets/html/en_gb/tethering_usb_help.html
index 5c5e931cdcd..50e21546903 100644
--- a/assets/html/en_gb/tethering_usb_help.html
+++ b/assets/html/en_gb/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/en_gb/tethering_wifi_help.html b/assets/html/en_gb/tethering_wifi_help.html
index 53faefbd5d6..3e8c1af0720 100644
--- a/assets/html/en_gb/tethering_wifi_help.html
+++ b/assets/html/en_gb/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/en_us/tethering_help.html b/assets/html/en_us/tethering_help.html
index 7f0445debfc..fa827d5ac4c 100644
--- a/assets/html/en_us/tethering_help.html
+++ b/assets/html/en_us/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html>
 <head>
 <style>
diff --git a/assets/html/en_us/tethering_usb_help.html b/assets/html/en_us/tethering_usb_help.html
index d1d27ff9ac9..23f39e5e46a 100644
--- a/assets/html/en_us/tethering_usb_help.html
+++ b/assets/html/en_us/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html>
 <head>
 <style>
diff --git a/assets/html/en_us/tethering_wifi_help.html b/assets/html/en_us/tethering_wifi_help.html
index 383fa680b7d..cd8398d14a6 100644
--- a/assets/html/en_us/tethering_wifi_help.html
+++ b/assets/html/en_us/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html>
 <head>
 <style>
diff --git a/assets/html/es/tethering_help.html b/assets/html/es/tethering_help.html
index 91c75b5e979..35a1e16bb61 100644
--- a/assets/html/es/tethering_help.html
+++ b/assets/html/es/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/es/tethering_usb_help.html b/assets/html/es/tethering_usb_help.html
index f26f9a0a755..ec7a7467272 100644
--- a/assets/html/es/tethering_usb_help.html
+++ b/assets/html/es/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/es/tethering_wifi_help.html b/assets/html/es/tethering_wifi_help.html
index 11c8571c638..07617359a8b 100644
--- a/assets/html/es/tethering_wifi_help.html
+++ b/assets/html/es/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/es_us/tethering_help.html b/assets/html/es_us/tethering_help.html
index 30dd50929d4..f3055a0bce9 100644
--- a/assets/html/es_us/tethering_help.html
+++ b/assets/html/es_us/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/es_us/tethering_usb_help.html b/assets/html/es_us/tethering_usb_help.html
index 0d29e820d6f..b29b8a9556b 100644
--- a/assets/html/es_us/tethering_usb_help.html
+++ b/assets/html/es_us/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/es_us/tethering_wifi_help.html b/assets/html/es_us/tethering_wifi_help.html
index ed9a55f869d..ae080939cfe 100644
--- a/assets/html/es_us/tethering_wifi_help.html
+++ b/assets/html/es_us/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/fr/tethering_help.html b/assets/html/fr/tethering_help.html
index 120bf1bd3c4..735606791c0 100644
--- a/assets/html/fr/tethering_help.html
+++ b/assets/html/fr/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/fr/tethering_usb_help.html b/assets/html/fr/tethering_usb_help.html
index 3187b4b3ca4..2000bcc2bb1 100644
--- a/assets/html/fr/tethering_usb_help.html
+++ b/assets/html/fr/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/fr/tethering_wifi_help.html b/assets/html/fr/tethering_wifi_help.html
index 4e4296afdb9..4fab911c242 100644
--- a/assets/html/fr/tethering_wifi_help.html
+++ b/assets/html/fr/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/it/tethering_help.html b/assets/html/it/tethering_help.html
index 9ef9219bedc..7434bb83c2a 100644
--- a/assets/html/it/tethering_help.html
+++ b/assets/html/it/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/it/tethering_usb_help.html b/assets/html/it/tethering_usb_help.html
index 01ede7eb7f6..fcd7a038493 100644
--- a/assets/html/it/tethering_usb_help.html
+++ b/assets/html/it/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/it/tethering_wifi_help.html b/assets/html/it/tethering_wifi_help.html
index a8dc40d5f16..d53b07f3962 100644
--- a/assets/html/it/tethering_wifi_help.html
+++ b/assets/html/it/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/ja/tethering_help.html b/assets/html/ja/tethering_help.html
index ce3534ca678..4fd606554c8 100644
--- a/assets/html/ja/tethering_help.html
+++ b/assets/html/ja/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/ja/tethering_usb_help.html b/assets/html/ja/tethering_usb_help.html
index 16c66075182..9bd95e6f247 100644
--- a/assets/html/ja/tethering_usb_help.html
+++ b/assets/html/ja/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/ja/tethering_wifi_help.html b/assets/html/ja/tethering_wifi_help.html
index b7ce3763f98..d6c2a9a0698 100644
--- a/assets/html/ja/tethering_wifi_help.html
+++ b/assets/html/ja/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/ko/tethering_help.html b/assets/html/ko/tethering_help.html
index 8fb0050b0f4..0239f68be54 100644
--- a/assets/html/ko/tethering_help.html
+++ b/assets/html/ko/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/ko/tethering_usb_help.html b/assets/html/ko/tethering_usb_help.html
index bdd40a9aff7..66ac3de7382 100644
--- a/assets/html/ko/tethering_usb_help.html
+++ b/assets/html/ko/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/ko/tethering_wifi_help.html b/assets/html/ko/tethering_wifi_help.html
index a63e9fae83a..b51b93e2bbf 100644
--- a/assets/html/ko/tethering_wifi_help.html
+++ b/assets/html/ko/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/nl/tethering_help.html b/assets/html/nl/tethering_help.html
index fd7a49de4f2..febd1afa00a 100644
--- a/assets/html/nl/tethering_help.html
+++ b/assets/html/nl/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/nl/tethering_usb_help.html b/assets/html/nl/tethering_usb_help.html
index c78ae563594..fc027da340a 100644
--- a/assets/html/nl/tethering_usb_help.html
+++ b/assets/html/nl/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/nl/tethering_wifi_help.html b/assets/html/nl/tethering_wifi_help.html
index 3ae30b85bf5..13f0fa0721e 100644
--- a/assets/html/nl/tethering_wifi_help.html
+++ b/assets/html/nl/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/no/tethering_help.html b/assets/html/no/tethering_help.html
index c493b8b11b6..2883592c7a2 100644
--- a/assets/html/no/tethering_help.html
+++ b/assets/html/no/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/no/tethering_usb_help.html b/assets/html/no/tethering_usb_help.html
index f0f34610b02..e32c8b227b0 100644
--- a/assets/html/no/tethering_usb_help.html
+++ b/assets/html/no/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/no/tethering_wifi_help.html b/assets/html/no/tethering_wifi_help.html
index 6caa7a33375..84e5910aa5f 100644
--- a/assets/html/no/tethering_wifi_help.html
+++ b/assets/html/no/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/pl/tethering_help.html b/assets/html/pl/tethering_help.html
index ffd6a6d3f80..271f92f4ecc 100644
--- a/assets/html/pl/tethering_help.html
+++ b/assets/html/pl/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/pl/tethering_usb_help.html b/assets/html/pl/tethering_usb_help.html
index d365dc959fd..67d343ca61d 100644
--- a/assets/html/pl/tethering_usb_help.html
+++ b/assets/html/pl/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/pl/tethering_wifi_help.html b/assets/html/pl/tethering_wifi_help.html
index 8f1cb074cd8..50a66a77dd1 100644
--- a/assets/html/pl/tethering_wifi_help.html
+++ b/assets/html/pl/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/pt_br/tethering_help.html b/assets/html/pt_br/tethering_help.html
index cbe7706c10e..00c4251b77f 100644
--- a/assets/html/pt_br/tethering_help.html
+++ b/assets/html/pt_br/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/pt_br/tethering_usb_help.html b/assets/html/pt_br/tethering_usb_help.html
index 2d6245d19a8..8db1cc264af 100644
--- a/assets/html/pt_br/tethering_usb_help.html
+++ b/assets/html/pt_br/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/pt_br/tethering_wifi_help.html b/assets/html/pt_br/tethering_wifi_help.html
index 3ea2ef5d370..88ca44f71c3 100644
--- a/assets/html/pt_br/tethering_wifi_help.html
+++ b/assets/html/pt_br/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
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diff --git a/assets/html/pt_pt/tethering_help.html b/assets/html/pt_pt/tethering_help.html
index 613f108bca8..ecf9c6535a2 100644
--- a/assets/html/pt_pt/tethering_help.html
+++ b/assets/html/pt_pt/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
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diff --git a/assets/html/pt_pt/tethering_usb_help.html b/assets/html/pt_pt/tethering_usb_help.html
index 737d4d58db1..8cfab8c4811 100644
--- a/assets/html/pt_pt/tethering_usb_help.html
+++ b/assets/html/pt_pt/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/pt_pt/tethering_wifi_help.html b/assets/html/pt_pt/tethering_wifi_help.html
index 67224cf6827..c214ae05fd5 100644
--- a/assets/html/pt_pt/tethering_wifi_help.html
+++ b/assets/html/pt_pt/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/ru/tethering_help.html b/assets/html/ru/tethering_help.html
index 016ec05b35c..e09e428633d 100644
--- a/assets/html/ru/tethering_help.html
+++ b/assets/html/ru/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
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diff --git a/assets/html/ru/tethering_usb_help.html b/assets/html/ru/tethering_usb_help.html
index 0b01cbeeb1e..570b88b0c6c 100644
--- a/assets/html/ru/tethering_usb_help.html
+++ b/assets/html/ru/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/ru/tethering_wifi_help.html b/assets/html/ru/tethering_wifi_help.html
index 8073fb8f2b0..6fcca625633 100644
--- a/assets/html/ru/tethering_wifi_help.html
+++ b/assets/html/ru/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/sv/tethering_help.html b/assets/html/sv/tethering_help.html
index e37df4336a4..2242e9820ab 100644
--- a/assets/html/sv/tethering_help.html
+++ b/assets/html/sv/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/sv/tethering_usb_help.html b/assets/html/sv/tethering_usb_help.html
index b0fed28d7e9..a16ec513937 100644
--- a/assets/html/sv/tethering_usb_help.html
+++ b/assets/html/sv/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/sv/tethering_wifi_help.html b/assets/html/sv/tethering_wifi_help.html
index 7206240a441..cfffe4d6462 100644
--- a/assets/html/sv/tethering_wifi_help.html
+++ b/assets/html/sv/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/tr/tethering_help.html b/assets/html/tr/tethering_help.html
index 5bad0241173..cb59618d314 100644
--- a/assets/html/tr/tethering_help.html
+++ b/assets/html/tr/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/tr/tethering_usb_help.html b/assets/html/tr/tethering_usb_help.html
index e0a06682301..9b01ff91bf3 100644
--- a/assets/html/tr/tethering_usb_help.html
+++ b/assets/html/tr/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/tr/tethering_wifi_help.html b/assets/html/tr/tethering_wifi_help.html
index fab92bc01f9..60f8206c0f8 100644
--- a/assets/html/tr/tethering_wifi_help.html
+++ b/assets/html/tr/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/zh_cn/tethering_help.html b/assets/html/zh_cn/tethering_help.html
index c360db85dd9..0513eb79669 100644
--- a/assets/html/zh_cn/tethering_help.html
+++ b/assets/html/zh_cn/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/zh_cn/tethering_usb_help.html b/assets/html/zh_cn/tethering_usb_help.html
index f05fc2a7091..adb3769db83 100644
--- a/assets/html/zh_cn/tethering_usb_help.html
+++ b/assets/html/zh_cn/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/zh_cn/tethering_wifi_help.html b/assets/html/zh_cn/tethering_wifi_help.html
index a6aa0b5f9d3..32a8792adaf 100644
--- a/assets/html/zh_cn/tethering_wifi_help.html
+++ b/assets/html/zh_cn/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/zh_tw/tethering_help.html b/assets/html/zh_tw/tethering_help.html
index 20128c72fe0..15f69c079f4 100644
--- a/assets/html/zh_tw/tethering_help.html
+++ b/assets/html/zh_tw/tethering_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/zh_tw/tethering_usb_help.html b/assets/html/zh_tw/tethering_usb_help.html
index 8152f99f2d4..f1a20df31f4 100644
--- a/assets/html/zh_tw/tethering_usb_help.html
+++ b/assets/html/zh_tw/tethering_usb_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
diff --git a/assets/html/zh_tw/tethering_wifi_help.html b/assets/html/zh_tw/tethering_wifi_help.html
index 39ade786c31..f91b1518954 100644
--- a/assets/html/zh_tw/tethering_wifi_help.html
+++ b/assets/html/zh_tw/tethering_wifi_help.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <html DIR="LTR">
 <head>
 <style>
