Updated Missing translations (markdown)

Missing-translations.md

@@ -10,6 +10,9 @@ There is a file called `lang-ignore.json` which lists keys that should be ignore
 
 ---
 
+## cs-CZ
+**👍 Complete!**
+
 ## da-DK
 * label.administrator: Administrator
 * label.all: All
@@ -64,12 +67,7 @@ There is a file called `lang-ignore.json` which lists keys that should be ignore
 * metrics.device.tablet: Tablet
 
 ## ja-JP
-* label.all: All
-* label.all-websites: All websites
-* label.realtime: Realtime
-* label.realtime-logs: Realtime logs
 * message.log.visitor: Visitor from {country} using {browser} on {os} {device}
-* message.powered-by: Powered by {name}
 
 ## mn-MN
 **👍 Complete!**