SilverStripe i18n Textcollector Task not loading - internationalization

Question

I'm using SilverStripe 3.4 and trying to translate my website. But on Windows I can't run the http://localhost/dev/tasks/i18nTextCollectorTask I get ERR_CONNECTION_RESET.
I tried to create the translation files manually and added them to the mysite directory:
/lang/de_DE.php
/lang/en_GB.php
containing the following code:
<?php
global $lang;
$lang['en_GB']['Header']['Contact'] = 'Get in Contact';
and in the Template:
<h5><% _t('Header.Contact', 'Nehmen Sie Kontakt auf') %></h5>
but the Text is always in German ... Why is it not translating and why can't I open the Text Collector on Windows?
Update
I started the collector via cli
framework/sake dev/tasks/BetterI18nTextCollectorTask "targetlocale=de,en&module=themes/xxx&flush=1"
and there are two yml files in my theme/lang directory. But the text is still not translating.
de.yml:
de:
Footer.ss:
__IMAGE: '%2.2s'
Header:
__Contact: 'Nehmen Sie Kontakt auf'
en.yml
en:
Footer.ss:
__IMAGE: '%2.2s'
Header:
__Contact: 'Get in Contact'

Answer 1

To utilize the text collector task, you'd have to install PHPUnit 3.7.
You can add it as a dev-dependency via composer, so that it doesn't get included in a production environment:
composer require --dev phpunit/phpunit ~3.7
As an alternative to the text-collector task, you could also use the better-i18n module:
composer require --dev zauberfisch/silverstripe-better-i18n
It also requires PHPUnit, so that installation is a must.
Language files written in PHP have been deprecated quite a long time ago. You should switch to YAML based language files, which look like this:
# File stored in lang/en.yml
en:
Header:
Contact: 'Get in contact'
# etc.
Update: There's also an updated syntax how to do translations in templates. You're using the old syntax that's going to be deprecated
This:
<h5><% _t('Header.Contact', 'Nehmen Sie Kontakt auf') %></h5>
should become this:
<h5><%t Header.Contact 'Nehmen Sie Kontakt auf' %></h5>
Relevant documentation.