Latest WordPress & bbPress in another language!

Currently i’m trying to develop something using wordpress & bbpress.
Everything flows pretty good when talking on functionality and the rest of features, but there is a problem.
Actually 2 problems. First I already posted here: https://bbpress.org/forums/topic/867
And now the second one:
The final release has to be in another language but english. It’s true, I found no troubles translating bbpress in my language and the rest of updated wordpress. But after what I’ve integrated both of api’s: the wordpress and bbpress; this resulted in the following error:
Fatal error: Cannot redeclare class streamreader in /var/www/pm/forum/bb-includes/streams.php on line 26
I suppose it’s because of the translations, cause when I did not defined BBLANG, everything worked well.
After a bit I thought, that a solution for my problem can be joining both of the bbpress and wordpress translation .mo’s and defining just WPLANG for my language settings. That worked, but I dont see this as a pretty simple and accessible solution for everybody!
I would be glad getting some help on that, If there is any other more easier solution, that would be cool.