Can't install new languages - Languages missing from install page - Joomla! Forum - community, help and support

i'm trying install new language website install languages page blank. i've tried searching nothing coming here.

this website under dev, started joomla 3.4 multilingual, has been running under dev few months few languages loaded during it's stages, know used work. website j3.6.2 , it's been while since i've tried load language, when need appears there none choose from.

attached screenshot page i'm trying find new languages install.
https://www.dropbox.com/s/j4in39jmt6ce6is/extensions%20%20install%20languages%20%20%20international%20%20%20administration.png?dl=0


i noticed issues may related. on website have localise extension installed. if click "translations" option on localise, don't see of translations. i'm pretty sure used there.

one last clue here have old copy of website 3.4.x , if there can see initial problem (missing languages install) not exist. can see them there. unfortunatly lot has been done new website can't roll , start again.

i'm guessing in joomla update(s) has broken functionality.

reviewed image. believe searching polish language pack. check version of polish language pack has been installed. going screen "extensions: manage" (extensions => manage -> manage).

it looks may have latest polish language pack installed in site. why not listed. try clear search string , search make sure other languages show up.

if in dire need, download polish language pack http://joomlacode.org/gf/project/jtranslation3_x/frs/?action=frsreleasebrowse&frs_package_id=6436 , install other extension.

note: site using joomla! 3.6.2 vulnerable. latest security release 3.6.4. suggest upgrading site joomla! 3.6.4. make sure test upgrade in separate environment before doing on production site.