Strange language behavior

I have recently install PHPlist 3, the front language should be german.
i add in config
" $default_system_language = ‘de’; " and " $language_module = ‘’; "

In Config / settings - transactional settings from english in german.

But if a user subscribed the newsletter he become his confirmation mail and other mails after subscribtion in englisch…

What i do wrong?

@Winock Possibly the content of the emails are controlled by the subscribe page. You might also also to choose German on the subscribe page.

Yes, some info in the second part of this chapter