a tongue of (no) one's own

Every owner of slaves shall, wherever possible, ensure that his slaves belong to as many ethnolinguistic groups as possible. If they cannot speech to each other, they cannot then foment rebellion and revolution.

...

but I have
a dumb tongue
tongue dumb
father tongue
and English is
my mother tongue
is
my father tongue
is a foreign lan lan lang
language
l/ anguish
anguish

...

Nourbese