diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 562b8cd38..93b03ac6a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -38,6 +38,7 @@ If you are not sure, feel free to create an empty pull request draft first.
 - Add a new notification
 - Add a chart
 - Fix a bug
+- Translations
 
 ### *️⃣ Requires one more reviewer
 
@@ -172,3 +173,7 @@ npm install
 Since previously updating vite 2.5.10 to 2.6.0 broke the application completely, from now on, it should update patch release version only. 
 
 Patch release = the third digit
+
+# Translations
+
+Please read: https://github.com/louislam/uptime-kuma/tree/master/src/languages
diff --git a/src/languages/et-EE.js b/src/languages/et-EE.js
index 7a660cb3f..a6be8232e 100644
--- a/src/languages/et-EE.js
+++ b/src/languages/et-EE.js
@@ -178,10 +178,10 @@ export default {
     "Add Group": "Lisa grupp",
     "Edit Status Page": "Muuda lehte",
     "Go to Dashboard": "Töölauale",
-    checkEverySecond: "Check every {0} seconds.",
+    checkEverySecond: "Kontrolli peale tõrget {0} sekundilise vahega.",
     telegram: "Telegram",
     webhook: "Webhook",
-    smtp: "Email (SMTP)",
+    smtp: "elektronpost (SMTP)",
     discord: "Discord",
     teams: "Microsoft Teams",
     signal: "Signal",
@@ -192,8 +192,8 @@ export default {
     pushy: "Pushy",
     octopush: "Octopush",
     lunasea: "LunaSea",
-    apprise: "Apprise (Support 50+ Notification services)",
+    apprise: "Apprise (vahendab üle 65 teavitusteenust)",
     pushbullet: "Pushbullet",
-    line: "Line Messenger",
+    line: "LINE",
     mattermost: "Mattermost",
 };
diff --git a/src/pages/EditMonitor.vue b/src/pages/EditMonitor.vue
index 96f221e8b..6a72dc82e 100644
--- a/src/pages/EditMonitor.vue
+++ b/src/pages/EditMonitor.vue
@@ -256,7 +256,7 @@ export default {
             // Source: https://digitalfortress.tech/tips/top-15-commonly-used-regex/
             ipRegexPattern: "((^\\s*((([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]))\\s*$)|(^\\s*((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){3}(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})|((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:))|(:(((:[0-9A-Fa-f]{1,4}){1,7})|((:[0-9A-Fa-f]{1,4}){0,5}:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:)))(%.+)?\\s*$))",
             // Source: https://stackoverflow.com/questions/106179/regular-expression-to-match-dns-hostname-or-ip-address
-            hostnameRegexPattern: "^(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\\-]*[a-zA-Z0-9])\\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\\-]*[A-Za-z0-9])$"
+            hostnameRegexPattern: "^(([a-zA-Z0-9_]|[a-zA-Z0-9_][a-zA-Z0-9\\-_]*[a-zA-Z0-9_])\\.)*([A-Za-z0-9_]|[A-Za-z0-9_][A-Za-z0-9\\-_]*[A-Za-z0-9_])$"
         };
     },