I dont have the plugin mentioned by luistinygod, I have tried some upgrades and am using also polylang 2.6.10. the buttons stil work and I can create correctly pointed posts in that way, however if I create posts independently I cannot fix that lateron by searching. The search in the polylang textfield, doesnt search anymore as it did before. Well I have a workaround, but it would be pleasent to know how to have it working as before.