I speak fluent Estonian.
Example: I speak Estonian fluently, which was not so easy at the beginning.
I speak fluent Estonian. Example: I speak Estonian fluently, which was not so easy at the beginning.
Ich spreche fließend Estnisch. 
Jag pratar flytande estniska. 
Jeg kan flydende estisk. 
Jeg snakker flytende estisk. 
Ég tala reiprennandi eistnesku. 
Ma räägin soravat eesti keelt. 
Aš kalbu estiškai laisvai. 
Es brīvi runāju igauniski. 
Puhun sujuvasti viroa.