Re : IT WORKS!
THe problem with "trnaslation is database" is that ... I think ... you don't have a tiki tool to upload the language.php to the database, I am right? So depends of the way people do it.
Some people compare the speed between database and language.php. Seems to be very close.
I never use translation in the db.
You can speed up your de site by compiling the templates for de in the panel admin/ system admin.
Some optimizations are still be done for the tra functions... I hope to have time to do it for 1.10
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