That's not true.
Example: Did you lie to me? Answer: No, that is not true.
That's not true. Example: Did you lie to me? Answer: No, that is not true.
Das ist nicht wahr. 
Det är inte sant. 
Det er ikke sandt. 
Det er ikke sant. 
Það er ekki satt. 
Se ei ole totta. 
See pole õige. 
Netiesa. 
Tā nav taisnība.