Why is google indexing my mainpage in English? How to get it to index in Turkish

Hi all,

I have recently launched a new version of our company's online aluminium sale website. It has two languages Turkish and English. However in this new version google is indexing our homepage in english in both Turkey and abroad. It didn't used to be this way, we used to always be indexed in Turkish. Would anybody know the reason for this for this?

We placed href lang attributes into the sitemap for both english and Turkish pages. Yet it doesnt seem to pick it up?

Would love it if someone can give some help or advice.