fix(i18n): add missing translation keys and remove 6 unused keys

Fixes incomplete translations in multiple languages where key names
were displayed instead of translated text. All 14 language files now
have 74 consistent keys.

Author: KristjanESPERANTO

cspell.config.json

@@ -44,7 +44,6 @@
     "MONITOROFF",
     "MONITORON",
     "MONITORSTATUS",
-    "MONITORTIMED",
     "MONITORTOGGLE",
     "mypayload",
     "Mysh",
@@ -75,7 +74,6 @@
     "TOGGLEFULLSCREEN",
     "Trixie",
     "unasserted",
-    "UPDATEMM",
     "updatenotification",
     "userpresence",
     "vcgencmd",