Newspaper ad sense

Hi I got the following message from ad sense (it was translated by google translate / the original message was on Serbian)

Your site is not ready to show ads
We’ve found policy violations on the site, which means it’s not ready to run ads yet.
Unsupported language
We do not allow content that:
it is not primarily in any of the supported languages.
See the content guidelines or search the Help Center for more information. Once you’ve fixed the violation, you can request a site review:
I confirm that I have rectified the policy violations at slavija-info.com

Originally I choose the Bosnian language and I modified it because Bosnian (latinic) and Serbian (mixed latinic and cyrillic) is almost the same language, but somehow ad sense detected that I choose the Bosnian, and the Bosnian is not supported by them. Now I changed the language on the “theme panel => translations” to Serbian.
As well I need to give you an explanation that Serbian is the only language that have latinic and cyrillic alphabet.
At your template the Serbian language is very messed up, half text is on latinic and half is on cyrillic, so this is why I originally choosed the Bosnian which is fully latinic.

Questions:
1. The Serbian translation have some serious mistakes, so if I will make correction to it, will google still recognize it as Serbian?
2. How google ads detecting the website language?
3. Exactly where is located it your template code which language using the website at this moment?
4. How can I check which language I am using at the present. At the moment when I choose the language in the “theme panel => translations” and when I save it and when I refresh the page, its not showing me anymore which language was my choosed language.

I wish to mention that I still use the English language in the “Dashboard => Settings => General=> Site Lanugage” I just changed the translation on the Theme Panel. I really wish to continue to use the englis for the dashboard … or do I must to change it for google ads as well?