Cache permissions had been set to 777 at installation. I've activated debug mode, checked it and it seems to do the same action again and again : I have 5000 lines of debug saying (and this on every single page) :
* About to connect() to translate.google.com port 80 (#0)
* Trying 173.194.34.134... * connected
* Connected to translate.google.com (173.194.34.134) port 80 (#0)
> GET /translate_a/t?client=a&text=Copyright+%C2%A9+2014+Advanced+Isovision.+All+Rights+Reserved.&tl=de&sl=en HTTP/1.1
User-Agent: Mozilla/5.0
Host: translate.google.com
Accept: */*
< HTTP/1.1 302 Found
< Location:
http://ipv4.google.com/sorry/IndexRedir ... %26sl%3Den< Date: Mon, 05 May 2014 10:33:47 GMT
< Pragma: no-cache
< Expires: Fri, 01 Jan 1990 00:00:00 GMT
< Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
< Content-Type: text/html; charset=UTF-8
< Server: HTTP server (unknown)
< Content-Length: 413
< X-XSS-Protection: 1; mode=block
< X-Frame-Options: SAMEORIGIN
< Alternate-Protocol: 80:quic
<
* Connection #0 to host translate.google.com left intact
* Closing connection #0
Request: client=a&text=Copyright+%C2%A9+2014+Advanced+Isovision.+All+Rights+Reserved.&tl=de&sl=en
Response: <HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
<TITLE>302 Moved</TITLE></HEAD><BODY>
<H1>302 Moved</H1>
The document has moved
<A HREF="http://ipv4.google.com/sorry/IndexRedirect?continue=http://translate.google.com/translate_a/t%3Fclient%3Da%26text%3DCopyright%2B%25C2%25A9%2B2014%2BAdvanced%2BIsovision.%2BAll%2BRights%2BReserved.%26tl%3Dde%26sl%3Den">here</A>.
</BODY></HTML>