You can translate the menu bottoms to your own language by editing a file named english.lng
This file is located here (C:\Program Files (x86)\SageTea Browser). Once you open it you will see two columns.

In order to translate from English to another language you will need to edit the second column for the equivalent word in the wished language

Next step is adding after the second line you wished language (e.g: miportuguese PortugueseEN)

After you finished all the column save the file with different name (e.g: portuguese) following this step you just will need to copy the file into a Sagetea Browser directory

(C:\Program Files\SageTea Browser), then relaunch it.

Then you are going to be able to select the Portuguese language.