We are in charge of a website with 7 languages for 16 countries. There are only slight content differences by countries (google.de | google.co.uk). The website is set-up with the correct language & country annotation e.g. de/DE/ | de/CH/ | en/GB/ | en/IE. All unwanted annotations are blocked by robots.txt. The «hreflang alternate» are also set.
The objective is, to make the website visible in local search engines. Therefore we have submitted a overview sitemap connected with a sitemap per country. The sitemap has been submitted now for quite a while, but Google has indexed only 10 % of the content.
We are looking for suggestion to boost the index process.