speaking ...?

[Unregistered]

The translator, speaking in Japanese, also used his hands and arms tried to translate what I had said earlier.

is the above sentence correct?

 

[julianna]

No, not correct, this is my suggestion :

The translator is speaking in Japanese, he is also using his hands and arms to try to translate what I had just said .

 

[Raymott]

No, not correct, this is my suggestion :

The translator is speaking in Japanese; he is also using his hands and arms to try to translate what I had just said .

You also have a run-on sentence. You need at least a semicolon here, or 'and', or start a new sentence.