I just tried aspell as spellchecker for the en.txt and want to share my experiences in a step-by-step howto:
1st check if aspell is installed for your language:
zypper se aspell
If needed, install additional packages like so:
zypper in aspell-id aspell-pt_BR
Assuming your translated text is in a file called mytranslation.txt, you can start the spellchecker like this:
aspell --encoding=utf-8 -l pt_BR -c mytranslation.txt
Attention! It will edit the original file and save a backup in mytranslation.txt.bak .