Will a Google penalty on a rootdomain affect subdomains?

[Kanute78]

Hi,

I am working for multi lingual websites under one brand.

English Language: www.example.com (Root domain)
Polish Language: pl.example.com (Sub domain)
Danish Language: dk.example.com (Sub domain)
German Language: de.example.com (Sub domain)

If Google will penalize main English domain for any of penalty including Panda, Penguin, Algorithmic, Manual penalty, Unnatural backlink penalty, and in that case main English domain will be suffered accordingly. But is it going to make any difference for sub domains as well?

It would be great if you specify the effects of each penalty on sub domains, if any.

P.S : All sites contain different content, different D class IP, and cross domain links are tagged with Nofollow.

[JS_Harris]

I would remove the nofollow tag, it's better not to link than to link with nofollow imo. I would also think that the subdomains will be treated separately, assuming they didn't also do whatever the main domain has done to earn the penalty.

Just a question, why not use the Google translate on page tool? It lets your visitors use a dropdown box to specify language and Google's javascript will translate all page content instantly on the same url. See more here: translate.google.com/translate_tools

All sites can benefit from that tool imo, it's really well put together and even allows you to go into your google account to modify any translations google is butchering.

Suggestions for a sentence translation can be made by any user of the website. Owners and editors can approve those suggestions to make them into corrections.

[sbook]

I can tell you my experience, but you have to make conclusions by yourself.

Some time ago we got our language subdomains penalized and even banned from google. Index did not get any effect at all. (Same IP's)

Another website got penalized the index english version (Panda), subdomain also got hit same percent (but subdomain content was unique and very good). (dirrefent IP's)